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Finding the Fourth Proportional to 561.27, 840.69 and 377.85

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Solution

The fourth proportional to 561.27, 840.69 and 377.85 is: 565.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.27 : 840.69 = 377.85 : x
  2. Step 2: Convert to fraction form
    561.27/840.69 = 377.85/x
  3. Step 3: Cross multiply
    561.27x = 840.69 × 377.85
  4. Step 4: Simplify right side
    561.27x = 317,654.72
  5. Step 5: Solve for x
    x = 317,654.72/561.27
  6. Step 6: Final answer
    x = 565.96

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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.