Home / 3,137.12-4,705.68-1,287.80

Finding the Fourth Proportional to 3,137.12, 4,705.68 and 1,287.80

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Solution

The fourth proportional to 3,137.12, 4,705.68 and 1,287.80 is: 1,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.12 : 4,705.68 = 1,287.80 : x
  2. Step 2: Convert to fraction form
    3,137.12/4,705.68 = 1,287.80/x
  3. Step 3: Cross multiply
    3,137.12x = 4,705.68 × 1,287.80
  4. Step 4: Simplify right side
    3,137.12x = 6,059,974.70
  5. Step 5: Solve for x
    x = 6,059,974.70/3,137.12
  6. Step 6: Final answer
    x = 1,931.70

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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.