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Finding the Fourth Proportional to 624.42, 862.56 and 499.89

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Solution

The fourth proportional to 624.42, 862.56 and 499.89 is: 690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.42 : 862.56 = 499.89 : x
  2. Step 2: Convert to fraction form
    624.42/862.56 = 499.89/x
  3. Step 3: Cross multiply
    624.42x = 862.56 × 499.89
  4. Step 4: Simplify right side
    624.42x = 431,185.12
  5. Step 5: Solve for x
    x = 431,185.12/624.42
  6. Step 6: Final answer
    x = 690.54

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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.