Home / 2,761.15-4,140.30-813.10

Finding the Fourth Proportional to 2,761.15, 4,140.30 and 813.10

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Solution

The fourth proportional to 2,761.15, 4,140.30 and 813.10 is: 1,219.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.15 : 4,140.30 = 813.10 : x
  2. Step 2: Convert to fraction form
    2,761.15/4,140.30 = 813.10/x
  3. Step 3: Cross multiply
    2,761.15x = 4,140.30 × 813.10
  4. Step 4: Simplify right side
    2,761.15x = 3,366,477.93
  5. Step 5: Solve for x
    x = 3,366,477.93/2,761.15
  6. Step 6: Final answer
    x = 1,219.23

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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.