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Finding the Fourth Proportional to 2,412.96, 3,619.80 and 769.62

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Solution

The fourth proportional to 2,412.96, 3,619.80 and 769.62 is: 1,154.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.96 : 3,619.80 = 769.62 : x
  2. Step 2: Convert to fraction form
    2,412.96/3,619.80 = 769.62/x
  3. Step 3: Cross multiply
    2,412.96x = 3,619.80 × 769.62
  4. Step 4: Simplify right side
    2,412.96x = 2,785,870.48
  5. Step 5: Solve for x
    x = 2,785,870.48/2,412.96
  6. Step 6: Final answer
    x = 1,154.54

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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.