Home / 1,387.80-2,081.57-566.15

Finding the Fourth Proportional to 1,387.80, 2,081.57 and 566.15

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Solution

The fourth proportional to 1,387.80, 2,081.57 and 566.15 is: 849.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.80 : 2,081.57 = 566.15 : x
  2. Step 2: Convert to fraction form
    1,387.80/2,081.57 = 566.15/x
  3. Step 3: Cross multiply
    1,387.80x = 2,081.57 × 566.15
  4. Step 4: Simplify right side
    1,387.80x = 1,178,467.62
  5. Step 5: Solve for x
    x = 1,178,467.62/1,387.80
  6. Step 6: Final answer
    x = 849.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.