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Finding the Fourth Proportional to 1,002.24, 1,503.12 and 318.24

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Solution

The fourth proportional to 1,002.24, 1,503.12 and 318.24 is: 477.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.24 : 1,503.12 = 318.24 : x
  2. Step 2: Convert to fraction form
    1,002.24/1,503.12 = 318.24/x
  3. Step 3: Cross multiply
    1,002.24x = 1,503.12 × 318.24
  4. Step 4: Simplify right side
    1,002.24x = 478,352.91
  5. Step 5: Solve for x
    x = 478,352.91/1,002.24
  6. Step 6: Final answer
    x = 477.28

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1.5x scale

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.