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Finding the Fourth Proportional to 2,862.68, 3,951.16 and 1,866.20

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Solution

The fourth proportional to 2,862.68, 3,951.16 and 1,866.20 is: 2,575.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,862.68 : 3,951.16 = 1,866.20 : x
  2. Step 2: Convert to fraction form
    2,862.68/3,951.16 = 1,866.20/x
  3. Step 3: Cross multiply
    2,862.68x = 3,951.16 × 1,866.20
  4. Step 4: Simplify right side
    2,862.68x = 7,373,654.79
  5. Step 5: Solve for x
    x = 7,373,654.79/2,862.68
  6. Step 6: Final answer
    x = 2,575.79

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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.