Home / 1,139.23-1,708.29-359.29

Finding the Fourth Proportional to 1,139.23, 1,708.29 and 359.29

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Solution

The fourth proportional to 1,139.23, 1,708.29 and 359.29 is: 538.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.23 : 1,708.29 = 359.29 : x
  2. Step 2: Convert to fraction form
    1,139.23/1,708.29 = 359.29/x
  3. Step 3: Cross multiply
    1,139.23x = 1,708.29 × 359.29
  4. Step 4: Simplify right side
    1,139.23x = 613,771.51
  5. Step 5: Solve for x
    x = 613,771.51/1,139.23
  6. Step 6: Final answer
    x = 538.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.