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Finding the Fourth Proportional to 674.24, 1,009.80 and 479.43

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Solution

The fourth proportional to 674.24, 1,009.80 and 479.43 is: 718.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.24 : 1,009.80 = 479.43 : x
  2. Step 2: Convert to fraction form
    674.24/1,009.80 = 479.43/x
  3. Step 3: Cross multiply
    674.24x = 1,009.80 × 479.43
  4. Step 4: Simplify right side
    674.24x = 484,128.41
  5. Step 5: Solve for x
    x = 484,128.41/674.24
  6. Step 6: Final answer
    x = 718.04

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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.