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Finding the Fourth Proportional to 527.88, 727.63 and 422.80

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Solution

The fourth proportional to 527.88, 727.63 and 422.80 is: 582.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.88 : 727.63 = 422.80 : x
  2. Step 2: Convert to fraction form
    527.88/727.63 = 422.80/x
  3. Step 3: Cross multiply
    527.88x = 727.63 × 422.80
  4. Step 4: Simplify right side
    527.88x = 307,641.96
  5. Step 5: Solve for x
    x = 307,641.96/527.88
  6. Step 6: Final answer
    x = 582.79

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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.