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Finding the Fourth Proportional to 630.24, 944.80 and 219.30

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Solution

The fourth proportional to 630.24, 944.80 and 219.30 is: 328.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.24 : 944.80 = 219.30 : x
  2. Step 2: Convert to fraction form
    630.24/944.80 = 219.30/x
  3. Step 3: Cross multiply
    630.24x = 944.80 × 219.30
  4. Step 4: Simplify right side
    630.24x = 207,191.75
  5. Step 5: Solve for x
    x = 207,191.75/630.24
  6. Step 6: Final answer
    x = 328.75

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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.