Home / 1,581.91-2,184.06-1,287.88

Finding the Fourth Proportional to 1,581.91, 2,184.06 and 1,287.88

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Solution

The fourth proportional to 1,581.91, 2,184.06 and 1,287.88 is: 1,778.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.91 : 2,184.06 = 1,287.88 : x
  2. Step 2: Convert to fraction form
    1,581.91/2,184.06 = 1,287.88/x
  3. Step 3: Cross multiply
    1,581.91x = 2,184.06 × 1,287.88
  4. Step 4: Simplify right side
    1,581.91x = 2,812,807.19
  5. Step 5: Solve for x
    x = 2,812,807.19/1,581.91
  6. Step 6: Final answer
    x = 1,778.11

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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.