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Finding the Fourth Proportional to 5,642,648.76, 7,789,238.10 and 3,809,589.18

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Solution

The fourth proportional to 5,642,648.76, 7,789,238.10 and 3,809,589.18 is: 5,258,841.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642,648.76 : 7,789,238.10 = 3,809,589.18 : x
  2. Step 2: Convert to fraction form
    5,642,648.76/7,789,238.10 = 3,809,589.18/x
  3. Step 3: Cross multiply
    5,642,648.76x = 7,789,238.10 × 3,809,589.18
  4. Step 4: Simplify right side
    5,642,648.76x = 29,673,797,186,203.76
  5. Step 5: Solve for x
    x = 29,673,797,186,203.76/5,642,648.76
  6. Step 6: Final answer
    x = 5,258,841.80

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.