Home / 1,855.12-2,560.40-1,192.80

Finding the Fourth Proportional to 1,855.12, 2,560.40 and 1,192.80

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Solution

The fourth proportional to 1,855.12, 2,560.40 and 1,192.80 is: 1,646.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.12 : 2,560.40 = 1,192.80 : x
  2. Step 2: Convert to fraction form
    1,855.12/2,560.40 = 1,192.80/x
  3. Step 3: Cross multiply
    1,855.12x = 2,560.40 × 1,192.80
  4. Step 4: Simplify right side
    1,855.12x = 3,054,045.12
  5. Step 5: Solve for x
    x = 3,054,045.12/1,855.12
  6. Step 6: Final answer
    x = 1,646.28

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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.