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Finding the Fourth Proportional to 257,412.40, 386,170.04 and 88,938.80

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Solution

The fourth proportional to 257,412.40, 386,170.04 and 88,938.80 is: 133,425.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,412.40 : 386,170.04 = 88,938.80 : x
  2. Step 2: Convert to fraction form
    257,412.40/386,170.04 = 88,938.80/x
  3. Step 3: Cross multiply
    257,412.40x = 386,170.04 × 88,938.80
  4. Step 4: Simplify right side
    257,412.40x = 34,345,499,953.55
  5. Step 5: Solve for x
    x = 34,345,499,953.55/257,412.40
  6. Step 6: Final answer
    x = 133,425.97

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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.