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Finding the Fourth Proportional to 687,902.32, 949,253.16 and 386,038

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Solution

The fourth proportional to 687,902.32, 949,253.16 and 386,038 is: 532,703.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,902.32 : 949,253.16 = 386,038 : x
  2. Step 2: Convert to fraction form
    687,902.32/949,253.16 = 386,038/x
  3. Step 3: Cross multiply
    687,902.32x = 949,253.16 × 386,038
  4. Step 4: Simplify right side
    687,902.32x = 366,447,791,380.08
  5. Step 5: Solve for x
    x = 366,447,791,380.08/687,902.32
  6. Step 6: Final answer
    x = 532,703.24

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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.