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Finding the Fourth Proportional to 551.85, 761.97 and 427.92

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Solution

The fourth proportional to 551.85, 761.97 and 427.92 is: 590.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.85 : 761.97 = 427.92 : x
  2. Step 2: Convert to fraction form
    551.85/761.97 = 427.92/x
  3. Step 3: Cross multiply
    551.85x = 761.97 × 427.92
  4. Step 4: Simplify right side
    551.85x = 326,062.20
  5. Step 5: Solve for x
    x = 326,062.20/551.85
  6. Step 6: Final answer
    x = 590.85

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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.