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Finding the Fourth Proportional to 687,873.59, 949,265.56 and 386,067.59

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Solution

The fourth proportional to 687,873.59, 949,265.56 and 386,067.59 is: 532,773.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,873.59 : 949,265.56 = 386,067.59 : x
  2. Step 2: Convert to fraction form
    687,873.59/949,265.56 = 386,067.59/x
  3. Step 3: Cross multiply
    687,873.59x = 949,265.56 × 386,067.59
  4. Step 4: Simplify right side
    687,873.59x = 366,480,667,019.20
  5. Step 5: Solve for x
    x = 366,480,667,019.20/687,873.59
  6. Step 6: Final answer
    x = 532,773.28

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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.