Home / 1,272.30-1,751.18-1,085.19

Finding the Fourth Proportional to 1,272.30, 1,751.18 and 1,085.19

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Solution

The fourth proportional to 1,272.30, 1,751.18 and 1,085.19 is: 1,493.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.30 : 1,751.18 = 1,085.19 : x
  2. Step 2: Convert to fraction form
    1,272.30/1,751.18 = 1,085.19/x
  3. Step 3: Cross multiply
    1,272.30x = 1,751.18 × 1,085.19
  4. Step 4: Simplify right side
    1,272.30x = 1,900,363.02
  5. Step 5: Solve for x
    x = 1,900,363.02/1,272.30
  6. Step 6: Final answer
    x = 1,493.64

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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.