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Finding the Fourth Proportional to 2,615.13, 3,922.70 and 969.75

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Solution

The fourth proportional to 2,615.13, 3,922.70 and 969.75 is: 1,454.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.13 : 3,922.70 = 969.75 : x
  2. Step 2: Convert to fraction form
    2,615.13/3,922.70 = 969.75/x
  3. Step 3: Cross multiply
    2,615.13x = 3,922.70 × 969.75
  4. Step 4: Simplify right side
    2,615.13x = 3,804,033.48
  5. Step 5: Solve for x
    x = 3,804,033.48/2,615.13
  6. Step 6: Final answer
    x = 1,454.63

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.