Home / 1,268.10-1,902.15-1,257.30

Finding the Fourth Proportional to 1,268.10, 1,902.15 and 1,257.30

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Solution

The fourth proportional to 1,268.10, 1,902.15 and 1,257.30 is: 1,885.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.10 : 1,902.15 = 1,257.30 : x
  2. Step 2: Convert to fraction form
    1,268.10/1,902.15 = 1,257.30/x
  3. Step 3: Cross multiply
    1,268.10x = 1,902.15 × 1,257.30
  4. Step 4: Simplify right side
    1,268.10x = 2,391,573.20
  5. Step 5: Solve for x
    x = 2,391,573.20/1,268.10
  6. Step 6: Final answer
    x = 1,885.95

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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.