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Finding the Fourth Proportional to 1,668.64, 2,301.69 and 1,079.59

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Solution

The fourth proportional to 1,668.64, 2,301.69 and 1,079.59 is: 1,489.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.64 : 2,301.69 = 1,079.59 : x
  2. Step 2: Convert to fraction form
    1,668.64/2,301.69 = 1,079.59/x
  3. Step 3: Cross multiply
    1,668.64x = 2,301.69 × 1,079.59
  4. Step 4: Simplify right side
    1,668.64x = 2,484,881.51
  5. Step 5: Solve for x
    x = 2,484,881.51/1,668.64
  6. Step 6: Final answer
    x = 1,489.17

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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.