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Finding the Fourth Proportional to 2,929.80, 4,395.13 and 1,080.76

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Solution

The fourth proportional to 2,929.80, 4,395.13 and 1,080.76 is: 1,621.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,929.80 : 4,395.13 = 1,080.76 : x
  2. Step 2: Convert to fraction form
    2,929.80/4,395.13 = 1,080.76/x
  3. Step 3: Cross multiply
    2,929.80x = 4,395.13 × 1,080.76
  4. Step 4: Simplify right side
    2,929.80x = 4,750,080.70
  5. Step 5: Solve for x
    x = 4,750,080.70/2,929.80
  6. Step 6: Final answer
    x = 1,621.30

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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.