Home / 2,721.52-4,080.12-989.20

Finding the Fourth Proportional to 2,721.52, 4,080.12 and 989.20

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Solution

The fourth proportional to 2,721.52, 4,080.12 and 989.20 is: 1,483.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.52 : 4,080.12 = 989.20 : x
  2. Step 2: Convert to fraction form
    2,721.52/4,080.12 = 989.20/x
  3. Step 3: Cross multiply
    2,721.52x = 4,080.12 × 989.20
  4. Step 4: Simplify right side
    2,721.52x = 4,036,054.70
  5. Step 5: Solve for x
    x = 4,036,054.70/2,721.52
  6. Step 6: Final answer
    x = 1,483.01

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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.