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Finding the Fourth Proportional to 398,437.60, 597,655.12 and 124,904.64

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Solution

The fourth proportional to 398,437.60, 597,655.12 and 124,904.64 is: 187,356.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,437.60 : 597,655.12 = 124,904.64 : x
  2. Step 2: Convert to fraction form
    398,437.60/597,655.12 = 124,904.64/x
  3. Step 3: Cross multiply
    398,437.60x = 597,655.12 × 124,904.64
  4. Step 4: Simplify right side
    398,437.60x = 74,649,897,607.76
  5. Step 5: Solve for x
    x = 74,649,897,607.76/398,437.60
  6. Step 6: Final answer
    x = 187,356.56

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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.