Home / 1,855.30-2,557.34-1,257.61

Finding the Fourth Proportional to 1,855.30, 2,557.34 and 1,257.61

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Solution

The fourth proportional to 1,855.30, 2,557.34 and 1,257.61 is: 1,733.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.30 : 2,557.34 = 1,257.61 : x
  2. Step 2: Convert to fraction form
    1,855.30/2,557.34 = 1,257.61/x
  3. Step 3: Cross multiply
    1,855.30x = 2,557.34 × 1,257.61
  4. Step 4: Simplify right side
    1,855.30x = 3,216,136.36
  5. Step 5: Solve for x
    x = 3,216,136.36/1,855.30
  6. Step 6: Final answer
    x = 1,733.49

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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.