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Finding the Fourth Proportional to 687,349.76, 948,587.52 and 385,564.16

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Solution

The fourth proportional to 687,349.76, 948,587.52 and 385,564.16 is: 532,103.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,349.76 : 948,587.52 = 385,564.16 : x
  2. Step 2: Convert to fraction form
    687,349.76/948,587.52 = 385,564.16/x
  3. Step 3: Cross multiply
    687,349.76x = 948,587.52 × 385,564.16
  4. Step 4: Simplify right side
    687,349.76x = 365,741,350,335.28
  5. Step 5: Solve for x
    x = 365,741,350,335.28/687,349.76
  6. Step 6: Final answer
    x = 532,103.70

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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.