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Finding the Fourth Proportional to 527.64, 791.47 and 142.89

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Solution

The fourth proportional to 527.64, 791.47 and 142.89 is: 214.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.64 : 791.47 = 142.89 : x
  2. Step 2: Convert to fraction form
    527.64/791.47 = 142.89/x
  3. Step 3: Cross multiply
    527.64x = 791.47 × 142.89
  4. Step 4: Simplify right side
    527.64x = 113,093.15
  5. Step 5: Solve for x
    x = 113,093.15/527.64
  6. Step 6: Final answer
    x = 214.34

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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.