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Finding the Fourth Proportional to 669.12, 1,003.88 and 450.62

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Solution

The fourth proportional to 669.12, 1,003.88 and 450.62 is: 676.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.12 : 1,003.88 = 450.62 : x
  2. Step 2: Convert to fraction form
    669.12/1,003.88 = 450.62/x
  3. Step 3: Cross multiply
    669.12x = 1,003.88 × 450.62
  4. Step 4: Simplify right side
    669.12x = 452,368.41
  5. Step 5: Solve for x
    x = 452,368.41/669.12
  6. Step 6: Final answer
    x = 676.06

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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.