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Finding the Fourth Proportional to 489,913.62, 676,063.47 and 275,062.74

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Solution

The fourth proportional to 489,913.62, 676,063.47 and 275,062.74 is: 379,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,913.62 : 676,063.47 = 275,062.74 : x
  2. Step 2: Convert to fraction form
    489,913.62/676,063.47 = 275,062.74/x
  3. Step 3: Cross multiply
    489,913.62x = 676,063.47 × 275,062.74
  4. Step 4: Simplify right side
    489,913.62x = 185,959,870,472.11
  5. Step 5: Solve for x
    x = 185,959,870,472.11/489,913.62
  6. Step 6: Final answer
    x = 379,576.85

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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.