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Finding the Fourth Proportional to 632.74, 872.55 and 411.70

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Solution

The fourth proportional to 632.74, 872.55 and 411.70 is: 567.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.74 : 872.55 = 411.70 : x
  2. Step 2: Convert to fraction form
    632.74/872.55 = 411.70/x
  3. Step 3: Cross multiply
    632.74x = 872.55 × 411.70
  4. Step 4: Simplify right side
    632.74x = 359,228.84
  5. Step 5: Solve for x
    x = 359,228.84/632.74
  6. Step 6: Final answer
    x = 567.74

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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.