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Finding the Fourth Proportional to 3,377.40, 5,065.68 and 912.36

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Solution

The fourth proportional to 3,377.40, 5,065.68 and 912.36 is: 1,368.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,377.40 : 5,065.68 = 912.36 : x
  2. Step 2: Convert to fraction form
    3,377.40/5,065.68 = 912.36/x
  3. Step 3: Cross multiply
    3,377.40x = 5,065.68 × 912.36
  4. Step 4: Simplify right side
    3,377.40x = 4,621,723.80
  5. Step 5: Solve for x
    x = 4,621,723.80/3,377.40
  6. Step 6: Final answer
    x = 1,368.43

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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.