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Finding the Fourth Proportional to 687,901.32, 949,251.78 and 386,037

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Solution

The fourth proportional to 687,901.32, 949,251.78 and 386,037 is: 532,701.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,901.32 : 949,251.78 = 386,037 : x
  2. Step 2: Convert to fraction form
    687,901.32/949,251.78 = 386,037/x
  3. Step 3: Cross multiply
    687,901.32x = 949,251.78 × 386,037
  4. Step 4: Simplify right side
    687,901.32x = 366,446,309,395.86
  5. Step 5: Solve for x
    x = 366,446,309,395.86/687,901.32
  6. Step 6: Final answer
    x = 532,701.86

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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.