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Finding the Fourth Proportional to 632.20, 947.80 and 424.18

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Solution

The fourth proportional to 632.20, 947.80 and 424.18 is: 635.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.20 : 947.80 = 424.18 : x
  2. Step 2: Convert to fraction form
    632.20/947.80 = 424.18/x
  3. Step 3: Cross multiply
    632.20x = 947.80 × 424.18
  4. Step 4: Simplify right side
    632.20x = 402,034.19
  5. Step 5: Solve for x
    x = 402,034.19/632.20
  6. Step 6: Final answer
    x = 635.93

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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.