Home / 3,130.20-4,694.99-821.70

Finding the Fourth Proportional to 3,130.20, 4,694.99 and 821.70

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Solution

The fourth proportional to 3,130.20, 4,694.99 and 821.70 is: 1,232.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.20 : 4,694.99 = 821.70 : x
  2. Step 2: Convert to fraction form
    3,130.20/4,694.99 = 821.70/x
  3. Step 3: Cross multiply
    3,130.20x = 4,694.99 × 821.70
  4. Step 4: Simplify right side
    3,130.20x = 3,857,869.47
  5. Step 5: Solve for x
    x = 3,857,869.47/3,130.20
  6. Step 6: Final answer
    x = 1,232.47

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.