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Finding the Fourth Proportional to 657.68, 985.88 and 550.16

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Solution

The fourth proportional to 657.68, 985.88 and 550.16 is: 824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.68 : 985.88 = 550.16 : x
  2. Step 2: Convert to fraction form
    657.68/985.88 = 550.16/x
  3. Step 3: Cross multiply
    657.68x = 985.88 × 550.16
  4. Step 4: Simplify right side
    657.68x = 542,391.74
  5. Step 5: Solve for x
    x = 542,391.74/657.68
  6. Step 6: Final answer
    x = 824.70

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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.