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Finding the Fourth Proportional to 955.70, 1,432.62 and 408.02

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Solution

The fourth proportional to 955.70, 1,432.62 and 408.02 is: 611.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.70 : 1,432.62 = 408.02 : x
  2. Step 2: Convert to fraction form
    955.70/1,432.62 = 408.02/x
  3. Step 3: Cross multiply
    955.70x = 1,432.62 × 408.02
  4. Step 4: Simplify right side
    955.70x = 584,537.61
  5. Step 5: Solve for x
    x = 584,537.61/955.70
  6. Step 6: Final answer
    x = 611.63

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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.