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Finding the Fourth Proportional to 668.72, 1,001.05 and 437.11

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Solution

The fourth proportional to 668.72, 1,001.05 and 437.11 is: 654.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.72 : 1,001.05 = 437.11 : x
  2. Step 2: Convert to fraction form
    668.72/1,001.05 = 437.11/x
  3. Step 3: Cross multiply
    668.72x = 1,001.05 × 437.11
  4. Step 4: Simplify right side
    668.72x = 437,565.37
  5. Step 5: Solve for x
    x = 437,565.37/668.72
  6. Step 6: Final answer
    x = 654.33

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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.