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Finding the Fourth Proportional to 961.99, 1,443.39 and 377.17

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Solution

The fourth proportional to 961.99, 1,443.39 and 377.17 is: 565.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.99 : 1,443.39 = 377.17 : x
  2. Step 2: Convert to fraction form
    961.99/1,443.39 = 377.17/x
  3. Step 3: Cross multiply
    961.99x = 1,443.39 × 377.17
  4. Step 4: Simplify right side
    961.99x = 544,403.41
  5. Step 5: Solve for x
    x = 544,403.41/961.99
  6. Step 6: Final answer
    x = 565.91

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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.