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Finding the Fourth Proportional to 521,661.20, 782,491.80 and 189,117.20

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Solution

The fourth proportional to 521,661.20, 782,491.80 and 189,117.20 is: 283,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,661.20 : 782,491.80 = 189,117.20 : x
  2. Step 2: Convert to fraction form
    521,661.20/782,491.80 = 189,117.20/x
  3. Step 3: Cross multiply
    521,661.20x = 782,491.80 × 189,117.20
  4. Step 4: Simplify right side
    521,661.20x = 147,982,658,238.96
  5. Step 5: Solve for x
    x = 147,982,658,238.96/521,661.20
  6. Step 6: Final answer
    x = 283,675.80

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.