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Finding the Fourth Proportional to 489,129.39, 674,712.59 and 307,553.85

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Solution

The fourth proportional to 489,129.39, 674,712.59 and 307,553.85 is: 424,244.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,129.39 : 674,712.59 = 307,553.85 : x
  2. Step 2: Convert to fraction form
    489,129.39/674,712.59 = 307,553.85/x
  3. Step 3: Cross multiply
    489,129.39x = 674,712.59 × 307,553.85
  4. Step 4: Simplify right side
    489,129.39x = 207,510,453,160.20
  5. Step 5: Solve for x
    x = 207,510,453,160.20/489,129.39
  6. Step 6: Final answer
    x = 424,244.50

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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.