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Finding the Fourth Proportional to 714.38, 986.46 and 550.22

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Solution

The fourth proportional to 714.38, 986.46 and 550.22 is: 759.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.38 : 986.46 = 550.22 : x
  2. Step 2: Convert to fraction form
    714.38/986.46 = 550.22/x
  3. Step 3: Cross multiply
    714.38x = 986.46 × 550.22
  4. Step 4: Simplify right side
    714.38x = 542,770.02
  5. Step 5: Solve for x
    x = 542,770.02/714.38
  6. Step 6: Final answer
    x = 759.78

Related Problems

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.