Home / 1,239.30-1,708.29-1,003.59

Finding the Fourth Proportional to 1,239.30, 1,708.29 and 1,003.59

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Solution

The fourth proportional to 1,239.30, 1,708.29 and 1,003.59 is: 1,383.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.30 : 1,708.29 = 1,003.59 : x
  2. Step 2: Convert to fraction form
    1,239.30/1,708.29 = 1,003.59/x
  3. Step 3: Cross multiply
    1,239.30x = 1,708.29 × 1,003.59
  4. Step 4: Simplify right side
    1,239.30x = 1,714,422.76
  5. Step 5: Solve for x
    x = 1,714,422.76/1,239.30
  6. Step 6: Final answer
    x = 1,383.38

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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.