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Finding the Fourth Proportional to 718.46, 1,074.99 and 424.88

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Solution

The fourth proportional to 718.46, 1,074.99 and 424.88 is: 635.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.46 : 1,074.99 = 424.88 : x
  2. Step 2: Convert to fraction form
    718.46/1,074.99 = 424.88/x
  3. Step 3: Cross multiply
    718.46x = 1,074.99 × 424.88
  4. Step 4: Simplify right side
    718.46x = 456,736.38
  5. Step 5: Solve for x
    x = 456,736.38/718.46
  6. Step 6: Final answer
    x = 635.72

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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.