Home / 1,139.04-1,708.25-359.10

Finding the Fourth Proportional to 1,139.04, 1,708.25 and 359.10

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Solution

The fourth proportional to 1,139.04, 1,708.25 and 359.10 is: 538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.04 : 1,708.25 = 359.10 : x
  2. Step 2: Convert to fraction form
    1,139.04/1,708.25 = 359.10/x
  3. Step 3: Cross multiply
    1,139.04x = 1,708.25 × 359.10
  4. Step 4: Simplify right side
    1,139.04x = 613,430.78
  5. Step 5: Solve for x
    x = 613,430.78/1,139.04
  6. Step 6: Final answer
    x = 538.55

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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.