Home / 4,306.80-6,460.20-1,387.20

Finding the Fourth Proportional to 4,306.80, 6,460.20 and 1,387.20

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Solution

The fourth proportional to 4,306.80, 6,460.20 and 1,387.20 is: 2,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,306.80 : 6,460.20 = 1,387.20 : x
  2. Step 2: Convert to fraction form
    4,306.80/6,460.20 = 1,387.20/x
  3. Step 3: Cross multiply
    4,306.80x = 6,460.20 × 1,387.20
  4. Step 4: Simplify right side
    4,306.80x = 8,961,589.44
  5. Step 5: Solve for x
    x = 8,961,589.44/4,306.80
  6. Step 6: Final answer
    x = 2,080.80

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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.