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Finding the Fourth Proportional to 961.55, 1,325.89 and 740.02

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Solution

The fourth proportional to 961.55, 1,325.89 and 740.02 is: 1,020.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.55 : 1,325.89 = 740.02 : x
  2. Step 2: Convert to fraction form
    961.55/1,325.89 = 740.02/x
  3. Step 3: Cross multiply
    961.55x = 1,325.89 × 740.02
  4. Step 4: Simplify right side
    961.55x = 981,185.12
  5. Step 5: Solve for x
    x = 981,185.12/961.55
  6. Step 6: Final answer
    x = 1,020.42

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1.5x scale

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.