Home / 3,277.40-4,916.10-812.20

Finding the Fourth Proportional to 3,277.40, 4,916.10 and 812.20

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Solution

The fourth proportional to 3,277.40, 4,916.10 and 812.20 is: 1,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,277.40 : 4,916.10 = 812.20 : x
  2. Step 2: Convert to fraction form
    3,277.40/4,916.10 = 812.20/x
  3. Step 3: Cross multiply
    3,277.40x = 4,916.10 × 812.20
  4. Step 4: Simplify right side
    3,277.40x = 3,992,856.42
  5. Step 5: Solve for x
    x = 3,992,856.42/3,277.40
  6. Step 6: Final answer
    x = 1,218.30

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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.