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Finding the Fourth Proportional to 667.71, 1,000.15 and 503.58

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Solution

The fourth proportional to 667.71, 1,000.15 and 503.58 is: 754.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.71 : 1,000.15 = 503.58 : x
  2. Step 2: Convert to fraction form
    667.71/1,000.15 = 503.58/x
  3. Step 3: Cross multiply
    667.71x = 1,000.15 × 503.58
  4. Step 4: Simplify right side
    667.71x = 503,658.03
  5. Step 5: Solve for x
    x = 503,658.03/667.71
  6. Step 6: Final answer
    x = 754.31

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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.