Home / 1,261.12-1,876.88-1,215.04

Finding the Fourth Proportional to 1,261.12, 1,876.88 and 1,215.04

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Solution

The fourth proportional to 1,261.12, 1,876.88 and 1,215.04 is: 1,808.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.12 : 1,876.88 = 1,215.04 : x
  2. Step 2: Convert to fraction form
    1,261.12/1,876.88 = 1,215.04/x
  3. Step 3: Cross multiply
    1,261.12x = 1,876.88 × 1,215.04
  4. Step 4: Simplify right side
    1,261.12x = 2,280,484.28
  5. Step 5: Solve for x
    x = 2,280,484.28/1,261.12
  6. Step 6: Final answer
    x = 1,808.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.