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Finding the Fourth Proportional to 673,982.76, 929,990.48 and 387,449.30

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Solution

The fourth proportional to 673,982.76, 929,990.48 and 387,449.30 is: 534,619.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,982.76 : 929,990.48 = 387,449.30 : x
  2. Step 2: Convert to fraction form
    673,982.76/929,990.48 = 387,449.30/x
  3. Step 3: Cross multiply
    673,982.76x = 929,990.48 × 387,449.30
  4. Step 4: Simplify right side
    673,982.76x = 360,324,160,482.66
  5. Step 5: Solve for x
    x = 360,324,160,482.66/673,982.76
  6. Step 6: Final answer
    x = 534,619.25

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Double scale
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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.