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Finding the Fourth Proportional to 2,761.23, 4,141.70 and 813.45

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Solution

The fourth proportional to 2,761.23, 4,141.70 and 813.45 is: 1,220.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.23 : 4,141.70 = 813.45 : x
  2. Step 2: Convert to fraction form
    2,761.23/4,141.70 = 813.45/x
  3. Step 3: Cross multiply
    2,761.23x = 4,141.70 × 813.45
  4. Step 4: Simplify right side
    2,761.23x = 3,369,061.80
  5. Step 5: Solve for x
    x = 3,369,061.80/2,761.23
  6. Step 6: Final answer
    x = 1,220.13

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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.