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Finding the Fourth Proportional to 663,251.10, 915,026.67 and 408,159.42

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Solution

The fourth proportional to 663,251.10, 915,026.67 and 408,159.42 is: 563,100.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,251.10 : 915,026.67 = 408,159.42 : x
  2. Step 2: Convert to fraction form
    663,251.10/915,026.67 = 408,159.42/x
  3. Step 3: Cross multiply
    663,251.10x = 915,026.67 × 408,159.42
  4. Step 4: Simplify right side
    663,251.10x = 373,476,754,911.73
  5. Step 5: Solve for x
    x = 373,476,754,911.73/663,251.10
  6. Step 6: Final answer
    x = 563,100.09

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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.