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Finding the Fourth Proportional to 963.70, 1,446.15 and 553.64

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Solution

The fourth proportional to 963.70, 1,446.15 and 553.64 is: 830.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.70 : 1,446.15 = 553.64 : x
  2. Step 2: Convert to fraction form
    963.70/1,446.15 = 553.64/x
  3. Step 3: Cross multiply
    963.70x = 1,446.15 × 553.64
  4. Step 4: Simplify right side
    963.70x = 800,641.33
  5. Step 5: Solve for x
    x = 800,641.33/963.70
  6. Step 6: Final answer
    x = 830.80

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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.