Home / 1,570.40-2,167.61-1,257.85

Finding the Fourth Proportional to 1,570.40, 2,167.61 and 1,257.85

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Solution

The fourth proportional to 1,570.40, 2,167.61 and 1,257.85 is: 1,736.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.40 : 2,167.61 = 1,257.85 : x
  2. Step 2: Convert to fraction form
    1,570.40/2,167.61 = 1,257.85/x
  3. Step 3: Cross multiply
    1,570.40x = 2,167.61 × 1,257.85
  4. Step 4: Simplify right side
    1,570.40x = 2,726,519.54
  5. Step 5: Solve for x
    x = 2,726,519.54/1,570.40
  6. Step 6: Final answer
    x = 1,736.19

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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.