Home / 1,549.56-2,138.58-1,287.12

Finding the Fourth Proportional to 1,549.56, 2,138.58 and 1,287.12

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Solution

The fourth proportional to 1,549.56, 2,138.58 and 1,287.12 is: 1,776.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.56 : 2,138.58 = 1,287.12 : x
  2. Step 2: Convert to fraction form
    1,549.56/2,138.58 = 1,287.12/x
  3. Step 3: Cross multiply
    1,549.56x = 2,138.58 × 1,287.12
  4. Step 4: Simplify right side
    1,549.56x = 2,752,609.09
  5. Step 5: Solve for x
    x = 2,752,609.09/1,549.56
  6. Step 6: Final answer
    x = 1,776.38

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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.