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Finding the Fourth Proportional to 398,405.76, 596,985.92 and 250,350.72

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Solution

The fourth proportional to 398,405.76, 596,985.92 and 250,350.72 is: 375,134.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,405.76 : 596,985.92 = 250,350.72 : x
  2. Step 2: Convert to fraction form
    398,405.76/596,985.92 = 250,350.72/x
  3. Step 3: Cross multiply
    398,405.76x = 596,985.92 × 250,350.72
  4. Step 4: Simplify right side
    398,405.76x = 149,455,854,901.86
  5. Step 5: Solve for x
    x = 149,455,854,901.86/398,405.76
  6. Step 6: Final answer
    x = 375,134.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.