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Finding the Fourth Proportional to 1,699.71, 2,549.56 and 659.18

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Solution

The fourth proportional to 1,699.71, 2,549.56 and 659.18 is: 988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,699.71 : 2,549.56 = 659.18 : x
  2. Step 2: Convert to fraction form
    1,699.71/2,549.56 = 659.18/x
  3. Step 3: Cross multiply
    1,699.71x = 2,549.56 × 659.18
  4. Step 4: Simplify right side
    1,699.71x = 1,680,609.78
  5. Step 5: Solve for x
    x = 1,680,609.78/1,699.71
  6. Step 6: Final answer
    x = 988.76

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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.