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Finding the Fourth Proportional to 961.03, 1,441.55 and 383.91

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Solution

The fourth proportional to 961.03, 1,441.55 and 383.91 is: 575.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.03 : 1,441.55 = 383.91 : x
  2. Step 2: Convert to fraction form
    961.03/1,441.55 = 383.91/x
  3. Step 3: Cross multiply
    961.03x = 1,441.55 × 383.91
  4. Step 4: Simplify right side
    961.03x = 553,418.85
  5. Step 5: Solve for x
    x = 553,418.85/961.03
  6. Step 6: Final answer
    x = 575.86

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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.