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Finding the Fourth Proportional to 1,002.57, 1,503.78 and 353.28

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Solution

The fourth proportional to 1,002.57, 1,503.78 and 353.28 is: 529.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.57 : 1,503.78 = 353.28 : x
  2. Step 2: Convert to fraction form
    1,002.57/1,503.78 = 353.28/x
  3. Step 3: Cross multiply
    1,002.57x = 1,503.78 × 353.28
  4. Step 4: Simplify right side
    1,002.57x = 531,255.40
  5. Step 5: Solve for x
    x = 531,255.40/1,002.57
  6. Step 6: Final answer
    x = 529.89

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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.