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Finding the Fourth Proportional to 2,695.22, 3,719.20 and 1,687.38

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Solution

The fourth proportional to 2,695.22, 3,719.20 and 1,687.38 is: 2,328.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,695.22 : 3,719.20 = 1,687.38 : x
  2. Step 2: Convert to fraction form
    2,695.22/3,719.20 = 1,687.38/x
  3. Step 3: Cross multiply
    2,695.22x = 3,719.20 × 1,687.38
  4. Step 4: Simplify right side
    2,695.22x = 6,275,676.66
  5. Step 5: Solve for x
    x = 6,275,676.66/2,695.22
  6. Step 6: Final answer
    x = 2,328.45

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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.