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Finding the Fourth Proportional to 632.70, 872.12 and 383.55

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Solution

The fourth proportional to 632.70, 872.12 and 383.55 is: 528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.70 : 872.12 = 383.55 : x
  2. Step 2: Convert to fraction form
    632.70/872.12 = 383.55/x
  3. Step 3: Cross multiply
    632.70x = 872.12 × 383.55
  4. Step 4: Simplify right side
    632.70x = 334,499.71
  5. Step 5: Solve for x
    x = 334,499.71/632.70
  6. Step 6: Final answer
    x = 528.69

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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.