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Finding the Fourth Proportional to 345,951.72, 518,990.31 and 156,501.36

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Solution

The fourth proportional to 345,951.72, 518,990.31 and 156,501.36 is: 234,780.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,951.72 : 518,990.31 = 156,501.36 : x
  2. Step 2: Convert to fraction form
    345,951.72/518,990.31 = 156,501.36/x
  3. Step 3: Cross multiply
    345,951.72x = 518,990.31 × 156,501.36
  4. Step 4: Simplify right side
    345,951.72x = 81,222,689,341.82
  5. Step 5: Solve for x
    x = 81,222,689,341.82/345,951.72
  6. Step 6: Final answer
    x = 234,780.42

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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.