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Finding the Fourth Proportional to 274,417.40, 411,656.34 and 87,385.88

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Solution

The fourth proportional to 274,417.40, 411,656.34 and 87,385.88 is: 131,088.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,417.40 : 411,656.34 = 87,385.88 : x
  2. Step 2: Convert to fraction form
    274,417.40/411,656.34 = 87,385.88/x
  3. Step 3: Cross multiply
    274,417.40x = 411,656.34 × 87,385.88
  4. Step 4: Simplify right side
    274,417.40x = 35,972,951,528.48
  5. Step 5: Solve for x
    x = 35,972,951,528.48/274,417.40
  6. Step 6: Final answer
    x = 131,088.45

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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.