Home / 1,687.97-2,530.40-1,140.34

Finding the Fourth Proportional to 1,687.97, 2,530.40 and 1,140.34

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Solution

The fourth proportional to 1,687.97, 2,530.40 and 1,140.34 is: 1,709.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.97 : 2,530.40 = 1,140.34 : x
  2. Step 2: Convert to fraction form
    1,687.97/2,530.40 = 1,140.34/x
  3. Step 3: Cross multiply
    1,687.97x = 2,530.40 × 1,140.34
  4. Step 4: Simplify right side
    1,687.97x = 2,885,516.34
  5. Step 5: Solve for x
    x = 2,885,516.34/1,687.97
  6. Step 6: Final answer
    x = 1,709.46

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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.