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Finding the Fourth Proportional to 1,668.47, 2,301.72 and 1,079.19

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Solution

The fourth proportional to 1,668.47, 2,301.72 and 1,079.19 is: 1,488.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.47 : 2,301.72 = 1,079.19 : x
  2. Step 2: Convert to fraction form
    1,668.47/2,301.72 = 1,079.19/x
  3. Step 3: Cross multiply
    1,668.47x = 2,301.72 × 1,079.19
  4. Step 4: Simplify right side
    1,668.47x = 2,483,989.16
  5. Step 5: Solve for x
    x = 2,483,989.16/1,668.47
  6. Step 6: Final answer
    x = 1,488.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.