Home / 1,391.02-2,085.91-1,255.34

Finding the Fourth Proportional to 1,391.02, 2,085.91 and 1,255.34

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Solution

The fourth proportional to 1,391.02, 2,085.91 and 1,255.34 is: 1,882.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.02 : 2,085.91 = 1,255.34 : x
  2. Step 2: Convert to fraction form
    1,391.02/2,085.91 = 1,255.34/x
  3. Step 3: Cross multiply
    1,391.02x = 2,085.91 × 1,255.34
  4. Step 4: Simplify right side
    1,391.02x = 2,618,526.26
  5. Step 5: Solve for x
    x = 2,618,526.26/1,391.02
  6. Step 6: Final answer
    x = 1,882.45

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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.