Home / 1,139.04-1,708.20-359.01

Finding the Fourth Proportional to 1,139.04, 1,708.20 and 359.01

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Solution

The fourth proportional to 1,139.04, 1,708.20 and 359.01 is: 538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.04 : 1,708.20 = 359.01 : x
  2. Step 2: Convert to fraction form
    1,139.04/1,708.20 = 359.01/x
  3. Step 3: Cross multiply
    1,139.04x = 1,708.20 × 359.01
  4. Step 4: Simplify right side
    1,139.04x = 613,260.88
  5. Step 5: Solve for x
    x = 613,260.88/1,139.04
  6. Step 6: Final answer
    x = 538.40

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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.