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Finding the Fourth Proportional to 520,843.72, 781,340.43 and 161,042.63

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Solution

The fourth proportional to 520,843.72, 781,340.43 and 161,042.63 is: 241,587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,843.72 : 781,340.43 = 161,042.63 : x
  2. Step 2: Convert to fraction form
    520,843.72/781,340.43 = 161,042.63/x
  3. Step 3: Cross multiply
    520,843.72x = 781,340.43 × 161,042.63
  4. Step 4: Simplify right side
    520,843.72x = 125,829,117,958.91
  5. Step 5: Solve for x
    x = 125,829,117,958.91/520,843.72
  6. Step 6: Final answer
    x = 241,587.09

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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.