Home / 3,123.20-4,685.08-1,274.45

Finding the Fourth Proportional to 3,123.20, 4,685.08 and 1,274.45

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Solution

The fourth proportional to 3,123.20, 4,685.08 and 1,274.45 is: 1,911.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.20 : 4,685.08 = 1,274.45 : x
  2. Step 2: Convert to fraction form
    3,123.20/4,685.08 = 1,274.45/x
  3. Step 3: Cross multiply
    3,123.20x = 4,685.08 × 1,274.45
  4. Step 4: Simplify right side
    3,123.20x = 5,970,873.59
  5. Step 5: Solve for x
    x = 5,970,873.59/3,123.20
  6. Step 6: Final answer
    x = 1,911.78

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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.