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Finding the Fourth Proportional to 669.07, 1,003.57 and 552.43

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Solution

The fourth proportional to 669.07, 1,003.57 and 552.43 is: 828.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.07 : 1,003.57 = 552.43 : x
  2. Step 2: Convert to fraction form
    669.07/1,003.57 = 552.43/x
  3. Step 3: Cross multiply
    669.07x = 1,003.57 × 552.43
  4. Step 4: Simplify right side
    669.07x = 554,402.18
  5. Step 5: Solve for x
    x = 554,402.18/669.07
  6. Step 6: Final answer
    x = 828.62

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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.