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Finding the Fourth Proportional to 1,891.76, 2,837.68 and 659.24

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Solution

The fourth proportional to 1,891.76, 2,837.68 and 659.24 is: 988.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.76 : 2,837.68 = 659.24 : x
  2. Step 2: Convert to fraction form
    1,891.76/2,837.68 = 659.24/x
  3. Step 3: Cross multiply
    1,891.76x = 2,837.68 × 659.24
  4. Step 4: Simplify right side
    1,891.76x = 1,870,710.68
  5. Step 5: Solve for x
    x = 1,870,710.68/1,891.76
  6. Step 6: Final answer
    x = 988.88

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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.