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Finding the Fourth Proportional to 1,388.43, 2,080.86 and 565.74

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Solution

The fourth proportional to 1,388.43, 2,080.86 and 565.74 is: 847.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.43 : 2,080.86 = 565.74 : x
  2. Step 2: Convert to fraction form
    1,388.43/2,080.86 = 565.74/x
  3. Step 3: Cross multiply
    1,388.43x = 2,080.86 × 565.74
  4. Step 4: Simplify right side
    1,388.43x = 1,177,225.74
  5. Step 5: Solve for x
    x = 1,177,225.74/1,388.43
  6. Step 6: Final answer
    x = 847.88

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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.