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Finding the Fourth Proportional to 2,074.68, 3,111.48 and 613.44

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Solution

The fourth proportional to 2,074.68, 3,111.48 and 613.44 is: 920.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.68 : 3,111.48 = 613.44 : x
  2. Step 2: Convert to fraction form
    2,074.68/3,111.48 = 613.44/x
  3. Step 3: Cross multiply
    2,074.68x = 3,111.48 × 613.44
  4. Step 4: Simplify right side
    2,074.68x = 1,908,706.29
  5. Step 5: Solve for x
    x = 1,908,706.29/2,074.68
  6. Step 6: Final answer
    x = 920.00

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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.