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Finding the Fourth Proportional to 963.96, 1,330.26 and 521.86

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Solution

The fourth proportional to 963.96, 1,330.26 and 521.86 is: 720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.96 : 1,330.26 = 521.86 : x
  2. Step 2: Convert to fraction form
    963.96/1,330.26 = 521.86/x
  3. Step 3: Cross multiply
    963.96x = 1,330.26 × 521.86
  4. Step 4: Simplify right side
    963.96x = 694,205.18
  5. Step 5: Solve for x
    x = 694,205.18/963.96
  6. Step 6: Final answer
    x = 720.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.