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Finding the Fourth Proportional to 561.86, 773.10 and 547.55

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Solution

The fourth proportional to 561.86, 773.10 and 547.55 is: 753.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.86 : 773.10 = 547.55 : x
  2. Step 2: Convert to fraction form
    561.86/773.10 = 547.55/x
  3. Step 3: Cross multiply
    561.86x = 773.10 × 547.55
  4. Step 4: Simplify right side
    561.86x = 423,310.91
  5. Step 5: Solve for x
    x = 423,310.91/561.86
  6. Step 6: Final answer
    x = 753.41

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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.