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Finding the Fourth Proportional to 257,450.40, 386,434.80 and 124,437.60

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Solution

The fourth proportional to 257,450.40, 386,434.80 and 124,437.60 is: 186,781.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,450.40 : 386,434.80 = 124,437.60 : x
  2. Step 2: Convert to fraction form
    257,450.40/386,434.80 = 124,437.60/x
  3. Step 3: Cross multiply
    257,450.40x = 386,434.80 × 124,437.60
  4. Step 4: Simplify right side
    257,450.40x = 48,087,019,068.48
  5. Step 5: Solve for x
    x = 48,087,019,068.48/257,450.40
  6. Step 6: Final answer
    x = 186,781.68

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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.