Home / 2,261.04-3,391.20-780.48

Finding the Fourth Proportional to 2,261.04, 3,391.20 and 780.48

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Solution

The fourth proportional to 2,261.04, 3,391.20 and 780.48 is: 1,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.04 : 3,391.20 = 780.48 : x
  2. Step 2: Convert to fraction form
    2,261.04/3,391.20 = 780.48/x
  3. Step 3: Cross multiply
    2,261.04x = 3,391.20 × 780.48
  4. Step 4: Simplify right side
    2,261.04x = 2,646,763.78
  5. Step 5: Solve for x
    x = 2,646,763.78/2,261.04
  6. Step 6: Final answer
    x = 1,170.60

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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.