Home / 3,855.04-5,781.96-1,257.40

Finding the Fourth Proportional to 3,855.04, 5,781.96 and 1,257.40

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Solution

The fourth proportional to 3,855.04, 5,781.96 and 1,257.40 is: 1,885.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.04 : 5,781.96 = 1,257.40 : x
  2. Step 2: Convert to fraction form
    3,855.04/5,781.96 = 1,257.40/x
  3. Step 3: Cross multiply
    3,855.04x = 5,781.96 × 1,257.40
  4. Step 4: Simplify right side
    3,855.04x = 7,270,236.50
  5. Step 5: Solve for x
    x = 7,270,236.50/3,855.04
  6. Step 6: Final answer
    x = 1,885.90

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1.5x scale

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.