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Finding the Fourth Proportional to 687,863.25, 949,251.29 and 386,057.25

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Solution

The fourth proportional to 687,863.25, 949,251.29 and 386,057.25 is: 532,759.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,863.25 : 949,251.29 = 386,057.25 : x
  2. Step 2: Convert to fraction form
    687,863.25/949,251.29 = 386,057.25/x
  3. Step 3: Cross multiply
    687,863.25x = 949,251.29 × 386,057.25
  4. Step 4: Simplify right side
    687,863.25x = 366,465,340,646.07
  5. Step 5: Solve for x
    x = 366,465,340,646.07/687,863.25
  6. Step 6: Final answer
    x = 532,759.01

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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.