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Finding the Fourth Proportional to 949.50, 1,431.59 and 759.42

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Solution

The fourth proportional to 949.50, 1,431.59 and 759.42 is: 1,145.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.50 : 1,431.59 = 759.42 : x
  2. Step 2: Convert to fraction form
    949.50/1,431.59 = 759.42/x
  3. Step 3: Cross multiply
    949.50x = 1,431.59 × 759.42
  4. Step 4: Simplify right side
    949.50x = 1,087,174.28
  5. Step 5: Solve for x
    x = 1,087,174.28/949.50
  6. Step 6: Final answer
    x = 1,145.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.