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Finding the Fourth Proportional to 1,515.66, 2,091.54 and 886.20

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Solution

The fourth proportional to 1,515.66, 2,091.54 and 886.20 is: 1,222.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.66 : 2,091.54 = 886.20 : x
  2. Step 2: Convert to fraction form
    1,515.66/2,091.54 = 886.20/x
  3. Step 3: Cross multiply
    1,515.66x = 2,091.54 × 886.20
  4. Step 4: Simplify right side
    1,515.66x = 1,853,522.75
  5. Step 5: Solve for x
    x = 1,853,522.75/1,515.66
  6. Step 6: Final answer
    x = 1,222.91

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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.