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Finding the Fourth Proportional to 961.08, 1,441.61 and 474.47

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Solution

The fourth proportional to 961.08, 1,441.61 and 474.47 is: 711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.08 : 1,441.61 = 474.47 : x
  2. Step 2: Convert to fraction form
    961.08/1,441.61 = 474.47/x
  3. Step 3: Cross multiply
    961.08x = 1,441.61 × 474.47
  4. Step 4: Simplify right side
    961.08x = 684,000.70
  5. Step 5: Solve for x
    x = 684,000.70/961.08
  6. Step 6: Final answer
    x = 711.70

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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.