Home / 1,139.06-1,708.90-359.03

Finding the Fourth Proportional to 1,139.06, 1,708.90 and 359.03

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Solution

The fourth proportional to 1,139.06, 1,708.90 and 359.03 is: 538.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.06 : 1,708.90 = 359.03 : x
  2. Step 2: Convert to fraction form
    1,139.06/1,708.90 = 359.03/x
  3. Step 3: Cross multiply
    1,139.06x = 1,708.90 × 359.03
  4. Step 4: Simplify right side
    1,139.06x = 613,549.74
  5. Step 5: Solve for x
    x = 613,549.74/1,139.06
  6. Step 6: Final answer
    x = 538.64

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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.