Home / 3,118.20-4,677.30-809.70

Finding the Fourth Proportional to 3,118.20, 4,677.30 and 809.70

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Solution

The fourth proportional to 3,118.20, 4,677.30 and 809.70 is: 1,214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.20 : 4,677.30 = 809.70 : x
  2. Step 2: Convert to fraction form
    3,118.20/4,677.30 = 809.70/x
  3. Step 3: Cross multiply
    3,118.20x = 4,677.30 × 809.70
  4. Step 4: Simplify right side
    3,118.20x = 3,787,209.81
  5. Step 5: Solve for x
    x = 3,787,209.81/3,118.20
  6. Step 6: Final answer
    x = 1,214.55

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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.