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Finding the Fourth Proportional to 424,279.73, 636,837.83 and 311,643.74

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Solution

The fourth proportional to 424,279.73, 636,837.83 and 311,643.74 is: 467,772.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,279.73 : 636,837.83 = 311,643.74 : x
  2. Step 2: Convert to fraction form
    424,279.73/636,837.83 = 311,643.74/x
  3. Step 3: Cross multiply
    424,279.73x = 636,837.83 × 311,643.74
  4. Step 4: Simplify right side
    424,279.73x = 198,466,521,556.47
  5. Step 5: Solve for x
    x = 198,466,521,556.47/424,279.73
  6. Step 6: Final answer
    x = 467,772.81

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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.