Home / 1,140.49-1,581.06-1,078.13

Finding the Fourth Proportional to 1,140.49, 1,581.06 and 1,078.13

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Solution

The fourth proportional to 1,140.49, 1,581.06 and 1,078.13 is: 1,494.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.49 : 1,581.06 = 1,078.13 : x
  2. Step 2: Convert to fraction form
    1,140.49/1,581.06 = 1,078.13/x
  3. Step 3: Cross multiply
    1,140.49x = 1,581.06 × 1,078.13
  4. Step 4: Simplify right side
    1,140.49x = 1,704,588.22
  5. Step 5: Solve for x
    x = 1,704,588.22/1,140.49
  6. Step 6: Final answer
    x = 1,494.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.