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Finding the Fourth Proportional to 528.60, 791.88 and 451.38

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Solution

The fourth proportional to 528.60, 791.88 and 451.38 is: 676.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.60 : 791.88 = 451.38 : x
  2. Step 2: Convert to fraction form
    528.60/791.88 = 451.38/x
  3. Step 3: Cross multiply
    528.60x = 791.88 × 451.38
  4. Step 4: Simplify right side
    528.60x = 357,438.79
  5. Step 5: Solve for x
    x = 357,438.79/528.60
  6. Step 6: Final answer
    x = 676.20

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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.