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Finding the Fourth Proportional to 1,001.50, 1,503 and 408.64

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Solution

The fourth proportional to 1,001.50, 1,503 and 408.64 is: 613.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.50 : 1,503 = 408.64 : x
  2. Step 2: Convert to fraction form
    1,001.50/1,503 = 408.64/x
  3. Step 3: Cross multiply
    1,001.50x = 1,503 × 408.64
  4. Step 4: Simplify right side
    1,001.50x = 614,185.92
  5. Step 5: Solve for x
    x = 614,185.92/1,001.50
  6. Step 6: Final answer
    x = 613.27

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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.