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Finding the Fourth Proportional to 257,761.17, 386,486.43 and 115,580.70

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Solution

The fourth proportional to 257,761.17, 386,486.43 and 115,580.70 is: 173,301.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,761.17 : 386,486.43 = 115,580.70 : x
  2. Step 2: Convert to fraction form
    257,761.17/386,486.43 = 115,580.70/x
  3. Step 3: Cross multiply
    257,761.17x = 386,486.43 × 115,580.70
  4. Step 4: Simplify right side
    257,761.17x = 44,670,373,086.12
  5. Step 5: Solve for x
    x = 44,670,373,086.12/257,761.17
  6. Step 6: Final answer
    x = 173,301.41

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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.