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Finding the Fourth Proportional to 963.85, 1,329.56 and 609.12

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Solution

The fourth proportional to 963.85, 1,329.56 and 609.12 is: 840.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.85 : 1,329.56 = 609.12 : x
  2. Step 2: Convert to fraction form
    963.85/1,329.56 = 609.12/x
  3. Step 3: Cross multiply
    963.85x = 1,329.56 × 609.12
  4. Step 4: Simplify right side
    963.85x = 809,864.25
  5. Step 5: Solve for x
    x = 809,864.25/963.85
  6. Step 6: Final answer
    x = 840.24

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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.