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Finding the Fourth Proportional to 632.39, 947.99 and 427.03

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Solution

The fourth proportional to 632.39, 947.99 and 427.03 is: 640.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.39 : 947.99 = 427.03 : x
  2. Step 2: Convert to fraction form
    632.39/947.99 = 427.03/x
  3. Step 3: Cross multiply
    632.39x = 947.99 × 427.03
  4. Step 4: Simplify right side
    632.39x = 404,818.87
  5. Step 5: Solve for x
    x = 404,818.87/632.39
  6. Step 6: Final answer
    x = 640.15

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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.