Home / 1,672.30-2,309.72-1,111.80

Finding the Fourth Proportional to 1,672.30, 2,309.72 and 1,111.80

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Solution

The fourth proportional to 1,672.30, 2,309.72 and 1,111.80 is: 1,535.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.30 : 2,309.72 = 1,111.80 : x
  2. Step 2: Convert to fraction form
    1,672.30/2,309.72 = 1,111.80/x
  3. Step 3: Cross multiply
    1,672.30x = 2,309.72 × 1,111.80
  4. Step 4: Simplify right side
    1,672.30x = 2,567,943.30
  5. Step 5: Solve for x
    x = 2,567,943.30/1,672.30
  6. Step 6: Final answer
    x = 1,535.57

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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.