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Finding the Fourth Proportional to 961.77, 1,442.97 and 414.39

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Solution

The fourth proportional to 961.77, 1,442.97 and 414.39 is: 621.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.77 : 1,442.97 = 414.39 : x
  2. Step 2: Convert to fraction form
    961.77/1,442.97 = 414.39/x
  3. Step 3: Cross multiply
    961.77x = 1,442.97 × 414.39
  4. Step 4: Simplify right side
    961.77x = 597,952.34
  5. Step 5: Solve for x
    x = 597,952.34/961.77
  6. Step 6: Final answer
    x = 621.72

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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.