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Finding the Fourth Proportional to 672.59, 1,008.67 and 347.91

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Solution

The fourth proportional to 672.59, 1,008.67 and 347.91 is: 521.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.59 : 1,008.67 = 347.91 : x
  2. Step 2: Convert to fraction form
    672.59/1,008.67 = 347.91/x
  3. Step 3: Cross multiply
    672.59x = 1,008.67 × 347.91
  4. Step 4: Simplify right side
    672.59x = 350,926.38
  5. Step 5: Solve for x
    x = 350,926.38/672.59
  6. Step 6: Final answer
    x = 521.75

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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.