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Finding the Fourth Proportional to 669.39, 1,001.64 and 617.76

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Solution

The fourth proportional to 669.39, 1,001.64 and 617.76 is: 924.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.39 : 1,001.64 = 617.76 : x
  2. Step 2: Convert to fraction form
    669.39/1,001.64 = 617.76/x
  3. Step 3: Cross multiply
    669.39x = 1,001.64 × 617.76
  4. Step 4: Simplify right side
    669.39x = 618,773.13
  5. Step 5: Solve for x
    x = 618,773.13/669.39
  6. Step 6: Final answer
    x = 924.38

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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.