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Finding the Fourth Proportional to 963.45, 1,326.87 and 914.04

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Solution

The fourth proportional to 963.45, 1,326.87 and 914.04 is: 1,258.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.45 : 1,326.87 = 914.04 : x
  2. Step 2: Convert to fraction form
    963.45/1,326.87 = 914.04/x
  3. Step 3: Cross multiply
    963.45x = 1,326.87 × 914.04
  4. Step 4: Simplify right side
    963.45x = 1,212,812.25
  5. Step 5: Solve for x
    x = 1,212,812.25/963.45
  6. Step 6: Final answer
    x = 1,258.82

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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.