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Finding the Fourth Proportional to 1,049.68, 1,574.56 and 680.32

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Solution

The fourth proportional to 1,049.68, 1,574.56 and 680.32 is: 1,020.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.68 : 1,574.56 = 680.32 : x
  2. Step 2: Convert to fraction form
    1,049.68/1,574.56 = 680.32/x
  3. Step 3: Cross multiply
    1,049.68x = 1,574.56 × 680.32
  4. Step 4: Simplify right side
    1,049.68x = 1,071,204.66
  5. Step 5: Solve for x
    x = 1,071,204.66/1,049.68
  6. Step 6: Final answer
    x = 1,020.51

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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.