Home / 2,681.28-3,699.30-1,687.56

Finding the Fourth Proportional to 2,681.28, 3,699.30 and 1,687.56

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Solution

The fourth proportional to 2,681.28, 3,699.30 and 1,687.56 is: 2,328.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.28 : 3,699.30 = 1,687.56 : x
  2. Step 2: Convert to fraction form
    2,681.28/3,699.30 = 1,687.56/x
  3. Step 3: Cross multiply
    2,681.28x = 3,699.30 × 1,687.56
  4. Step 4: Simplify right side
    2,681.28x = 6,242,790.71
  5. Step 5: Solve for x
    x = 6,242,790.71/2,681.28
  6. Step 6: Final answer
    x = 2,328.29

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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.