Home / 1,387.23-2,085.30-1,116.33

Finding the Fourth Proportional to 1,387.23, 2,085.30 and 1,116.33

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Solution

The fourth proportional to 1,387.23, 2,085.30 and 1,116.33 is: 1,678.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.23 : 2,085.30 = 1,116.33 : x
  2. Step 2: Convert to fraction form
    1,387.23/2,085.30 = 1,116.33/x
  3. Step 3: Cross multiply
    1,387.23x = 2,085.30 × 1,116.33
  4. Step 4: Simplify right side
    1,387.23x = 2,327,882.95
  5. Step 5: Solve for x
    x = 2,327,882.95/1,387.23
  6. Step 6: Final answer
    x = 1,678.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.