Home / 1,581.41-2,182.40-918.29

Finding the Fourth Proportional to 1,581.41, 2,182.40 and 918.29

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Solution

The fourth proportional to 1,581.41, 2,182.40 and 918.29 is: 1,267.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.41 : 2,182.40 = 918.29 : x
  2. Step 2: Convert to fraction form
    1,581.41/2,182.40 = 918.29/x
  3. Step 3: Cross multiply
    1,581.41x = 2,182.40 × 918.29
  4. Step 4: Simplify right side
    1,581.41x = 2,004,060.59
  5. Step 5: Solve for x
    x = 2,004,060.59/1,581.41
  6. Step 6: Final answer
    x = 1,267.27

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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.