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Finding the Fourth Proportional to 274,545.48, 378,872.91 and 153,687

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Solution

The fourth proportional to 274,545.48, 378,872.91 and 153,687 is: 212,088.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,545.48 : 378,872.91 = 153,687 : x
  2. Step 2: Convert to fraction form
    274,545.48/378,872.91 = 153,687/x
  3. Step 3: Cross multiply
    274,545.48x = 378,872.91 × 153,687
  4. Step 4: Simplify right side
    274,545.48x = 58,227,840,919.17
  5. Step 5: Solve for x
    x = 58,227,840,919.17/274,545.48
  6. Step 6: Final answer
    x = 212,088.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.