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Finding the Fourth Proportional to 630.80, 944.32 and 469.20

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Solution

The fourth proportional to 630.80, 944.32 and 469.20 is: 702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.80 : 944.32 = 469.20 : x
  2. Step 2: Convert to fraction form
    630.80/944.32 = 469.20/x
  3. Step 3: Cross multiply
    630.80x = 944.32 × 469.20
  4. Step 4: Simplify right side
    630.80x = 443,074.94
  5. Step 5: Solve for x
    x = 443,074.94/630.80
  6. Step 6: Final answer
    x = 702.40

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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.