Home / 1,239.24-1,708.44-1,200.90

Finding the Fourth Proportional to 1,239.24, 1,708.44 and 1,200.90

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Solution

The fourth proportional to 1,239.24, 1,708.44 and 1,200.90 is: 1,655.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.24 : 1,708.44 = 1,200.90 : x
  2. Step 2: Convert to fraction form
    1,239.24/1,708.44 = 1,200.90/x
  3. Step 3: Cross multiply
    1,239.24x = 1,708.44 × 1,200.90
  4. Step 4: Simplify right side
    1,239.24x = 2,051,665.60
  5. Step 5: Solve for x
    x = 2,051,665.60/1,239.24
  6. Step 6: Final answer
    x = 1,655.58

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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.