Home / 3,122.70-4,685.65-1,478.81

Finding the Fourth Proportional to 3,122.70, 4,685.65 and 1,478.81

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Solution

The fourth proportional to 3,122.70, 4,685.65 and 1,478.81 is: 2,218.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.70 : 4,685.65 = 1,478.81 : x
  2. Step 2: Convert to fraction form
    3,122.70/4,685.65 = 1,478.81/x
  3. Step 3: Cross multiply
    3,122.70x = 4,685.65 × 1,478.81
  4. Step 4: Simplify right side
    3,122.70x = 6,929,167.74
  5. Step 5: Solve for x
    x = 6,929,167.74/3,122.70
  6. Step 6: Final answer
    x = 2,218.97

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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.