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Finding the Fourth Proportional to 1,301.28, 1,796 and 971.36

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Solution

The fourth proportional to 1,301.28, 1,796 and 971.36 is: 1,340.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.28 : 1,796 = 971.36 : x
  2. Step 2: Convert to fraction form
    1,301.28/1,796 = 971.36/x
  3. Step 3: Cross multiply
    1,301.28x = 1,796 × 971.36
  4. Step 4: Simplify right side
    1,301.28x = 1,744,562.56
  5. Step 5: Solve for x
    x = 1,744,562.56/1,301.28
  6. Step 6: Final answer
    x = 1,340.65

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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.