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Finding the Fourth Proportional to 961.13, 1,324.60 and 698.69

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Solution

The fourth proportional to 961.13, 1,324.60 and 698.69 is: 962.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.13 : 1,324.60 = 698.69 : x
  2. Step 2: Convert to fraction form
    961.13/1,324.60 = 698.69/x
  3. Step 3: Cross multiply
    961.13x = 1,324.60 × 698.69
  4. Step 4: Simplify right side
    961.13x = 925,484.77
  5. Step 5: Solve for x
    x = 925,484.77/961.13
  6. Step 6: Final answer
    x = 962.91

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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.