Home / 1,920.98-2,649.21-1,257.59

Finding the Fourth Proportional to 1,920.98, 2,649.21 and 1,257.59

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Solution

The fourth proportional to 1,920.98, 2,649.21 and 1,257.59 is: 1,734.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.98 : 2,649.21 = 1,257.59 : x
  2. Step 2: Convert to fraction form
    1,920.98/2,649.21 = 1,257.59/x
  3. Step 3: Cross multiply
    1,920.98x = 2,649.21 × 1,257.59
  4. Step 4: Simplify right side
    1,920.98x = 3,331,621.91
  5. Step 5: Solve for x
    x = 3,331,621.91/1,920.98
  6. Step 6: Final answer
    x = 1,734.33

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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.