Home / 1,388.67-2,089.97-1,043.79

Finding the Fourth Proportional to 1,388.67, 2,089.97 and 1,043.79

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Solution

The fourth proportional to 1,388.67, 2,089.97 and 1,043.79 is: 1,570.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.67 : 2,089.97 = 1,043.79 : x
  2. Step 2: Convert to fraction form
    1,388.67/2,089.97 = 1,043.79/x
  3. Step 3: Cross multiply
    1,388.67x = 2,089.97 × 1,043.79
  4. Step 4: Simplify right side
    1,388.67x = 2,181,484.57
  5. Step 5: Solve for x
    x = 2,181,484.57/1,388.67
  6. Step 6: Final answer
    x = 1,570.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.