Home / 1,758.40-2,634.90-1,661.20

Finding the Fourth Proportional to 1,758.40, 2,634.90 and 1,661.20

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Solution

The fourth proportional to 1,758.40, 2,634.90 and 1,661.20 is: 2,489.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.40 : 2,634.90 = 1,661.20 : x
  2. Step 2: Convert to fraction form
    1,758.40/2,634.90 = 1,661.20/x
  3. Step 3: Cross multiply
    1,758.40x = 2,634.90 × 1,661.20
  4. Step 4: Simplify right side
    1,758.40x = 4,377,095.88
  5. Step 5: Solve for x
    x = 4,377,095.88/1,758.40
  6. Step 6: Final answer
    x = 2,489.25

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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.