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Finding the Fourth Proportional to 632.64, 876.60 and 624.72

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Solution

The fourth proportional to 632.64, 876.60 and 624.72 is: 865.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.64 : 876.60 = 624.72 : x
  2. Step 2: Convert to fraction form
    632.64/876.60 = 624.72/x
  3. Step 3: Cross multiply
    632.64x = 876.60 × 624.72
  4. Step 4: Simplify right side
    632.64x = 547,629.55
  5. Step 5: Solve for x
    x = 547,629.55/632.64
  6. Step 6: Final answer
    x = 865.63

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.