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Finding the Fourth Proportional to 671.72, 925.44 and 561.04

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Solution

The fourth proportional to 671.72, 925.44 and 561.04 is: 772.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.72 : 925.44 = 561.04 : x
  2. Step 2: Convert to fraction form
    671.72/925.44 = 561.04/x
  3. Step 3: Cross multiply
    671.72x = 925.44 × 561.04
  4. Step 4: Simplify right side
    671.72x = 519,208.86
  5. Step 5: Solve for x
    x = 519,208.86/671.72
  6. Step 6: Final answer
    x = 772.95

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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.