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Finding the Fourth Proportional to 527.72, 791.55 and 515.36

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Solution

The fourth proportional to 527.72, 791.55 and 515.36 is: 773.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.72 : 791.55 = 515.36 : x
  2. Step 2: Convert to fraction form
    527.72/791.55 = 515.36/x
  3. Step 3: Cross multiply
    527.72x = 791.55 × 515.36
  4. Step 4: Simplify right side
    527.72x = 407,929.25
  5. Step 5: Solve for x
    x = 407,929.25/527.72
  6. Step 6: Final answer
    x = 773.01

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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.