Home / 1,729.80-2,387.66-1,021.59

Finding the Fourth Proportional to 1,729.80, 2,387.66 and 1,021.59

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Solution

The fourth proportional to 1,729.80, 2,387.66 and 1,021.59 is: 1,410.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.80 : 2,387.66 = 1,021.59 : x
  2. Step 2: Convert to fraction form
    1,729.80/2,387.66 = 1,021.59/x
  3. Step 3: Cross multiply
    1,729.80x = 2,387.66 × 1,021.59
  4. Step 4: Simplify right side
    1,729.80x = 2,439,204.47
  5. Step 5: Solve for x
    x = 2,439,204.47/1,729.80
  6. Step 6: Final answer
    x = 1,410.11

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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.