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Finding the Fourth Proportional to 669.64, 1,003.38 and 531.96

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Solution

The fourth proportional to 669.64, 1,003.38 and 531.96 is: 797.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.64 : 1,003.38 = 531.96 : x
  2. Step 2: Convert to fraction form
    669.64/1,003.38 = 531.96/x
  3. Step 3: Cross multiply
    669.64x = 1,003.38 × 531.96
  4. Step 4: Simplify right side
    669.64x = 533,758.02
  5. Step 5: Solve for x
    x = 533,758.02/669.64
  6. Step 6: Final answer
    x = 797.08

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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.