Home / 1,580.31-2,180.66-1,139.13

Finding the Fourth Proportional to 1,580.31, 2,180.66 and 1,139.13

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Solution

The fourth proportional to 1,580.31, 2,180.66 and 1,139.13 is: 1,571.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.31 : 2,180.66 = 1,139.13 : x
  2. Step 2: Convert to fraction form
    1,580.31/2,180.66 = 1,139.13/x
  3. Step 3: Cross multiply
    1,580.31x = 2,180.66 × 1,139.13
  4. Step 4: Simplify right side
    1,580.31x = 2,484,049.53
  5. Step 5: Solve for x
    x = 2,484,049.53/1,580.31
  6. Step 6: Final answer
    x = 1,571.87

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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.