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Finding the Fourth Proportional to 484,013.80, 726,279.90 and 217,815.40

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Solution

The fourth proportional to 484,013.80, 726,279.90 and 217,815.40 is: 326,839.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,013.80 : 726,279.90 = 217,815.40 : x
  2. Step 2: Convert to fraction form
    484,013.80/726,279.90 = 217,815.40/x
  3. Step 3: Cross multiply
    484,013.80x = 726,279.90 × 217,815.40
  4. Step 4: Simplify right side
    484,013.80x = 158,194,946,930.46
  5. Step 5: Solve for x
    x = 158,194,946,930.46/484,013.80
  6. Step 6: Final answer
    x = 326,839.74

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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.