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Finding the Fourth Proportional to 961.85, 1,443.21 and 474.63

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Solution

The fourth proportional to 961.85, 1,443.21 and 474.63 is: 712.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.85 : 1,443.21 = 474.63 : x
  2. Step 2: Convert to fraction form
    961.85/1,443.21 = 474.63/x
  3. Step 3: Cross multiply
    961.85x = 1,443.21 × 474.63
  4. Step 4: Simplify right side
    961.85x = 684,988.39
  5. Step 5: Solve for x
    x = 684,988.39/961.85
  6. Step 6: Final answer
    x = 712.16

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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.