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Finding the Fourth Proportional to 2,574.80, 3,860.88 and 843.20

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Solution

The fourth proportional to 2,574.80, 3,860.88 and 843.20 is: 1,264.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,574.80 : 3,860.88 = 843.20 : x
  2. Step 2: Convert to fraction form
    2,574.80/3,860.88 = 843.20/x
  3. Step 3: Cross multiply
    2,574.80x = 3,860.88 × 843.20
  4. Step 4: Simplify right side
    2,574.80x = 3,255,494.02
  5. Step 5: Solve for x
    x = 3,255,494.02/2,574.80
  6. Step 6: Final answer
    x = 1,264.37

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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.