Home / 1,301.28-1,795.68-711.80

Finding the Fourth Proportional to 1,301.28, 1,795.68 and 711.80

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Solution

The fourth proportional to 1,301.28, 1,795.68 and 711.80 is: 982.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.28 : 1,795.68 = 711.80 : x
  2. Step 2: Convert to fraction form
    1,301.28/1,795.68 = 711.80/x
  3. Step 3: Cross multiply
    1,301.28x = 1,795.68 × 711.80
  4. Step 4: Simplify right side
    1,301.28x = 1,278,165.02
  5. Step 5: Solve for x
    x = 1,278,165.02/1,301.28
  6. Step 6: Final answer
    x = 982.24

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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.