Home / 1,680.89-2,317.68-1,255.64

Finding the Fourth Proportional to 1,680.89, 2,317.68 and 1,255.64

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Solution

The fourth proportional to 1,680.89, 2,317.68 and 1,255.64 is: 1,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.89 : 2,317.68 = 1,255.64 : x
  2. Step 2: Convert to fraction form
    1,680.89/2,317.68 = 1,255.64/x
  3. Step 3: Cross multiply
    1,680.89x = 2,317.68 × 1,255.64
  4. Step 4: Simplify right side
    1,680.89x = 2,910,160.13
  5. Step 5: Solve for x
    x = 2,910,160.13/1,680.89
  6. Step 6: Final answer
    x = 1,731.33

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1.5x scale

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.