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Finding the Fourth Proportional to 1,668.81, 2,301.89 and 1,005.02

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Solution

The fourth proportional to 1,668.81, 2,301.89 and 1,005.02 is: 1,386.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.81 : 2,301.89 = 1,005.02 : x
  2. Step 2: Convert to fraction form
    1,668.81/2,301.89 = 1,005.02/x
  3. Step 3: Cross multiply
    1,668.81x = 2,301.89 × 1,005.02
  4. Step 4: Simplify right side
    1,668.81x = 2,313,446.22
  5. Step 5: Solve for x
    x = 2,313,446.22/1,668.81
  6. Step 6: Final answer
    x = 1,386.28

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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.