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Finding the Fourth Proportional to 3,561.78, 4,914.40 and 2,068.78

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Solution

The fourth proportional to 3,561.78, 4,914.40 and 2,068.78 is: 2,854.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.78 : 4,914.40 = 2,068.78 : x
  2. Step 2: Convert to fraction form
    3,561.78/4,914.40 = 2,068.78/x
  3. Step 3: Cross multiply
    3,561.78x = 4,914.40 × 2,068.78
  4. Step 4: Simplify right side
    3,561.78x = 10,166,812.43
  5. Step 5: Solve for x
    x = 10,166,812.43/3,561.78
  6. Step 6: Final answer
    x = 2,854.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.