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Finding the Fourth Proportional to 2,740.91, 4,110.42 and 891.58

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Solution

The fourth proportional to 2,740.91, 4,110.42 and 891.58 is: 1,337.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.91 : 4,110.42 = 891.58 : x
  2. Step 2: Convert to fraction form
    2,740.91/4,110.42 = 891.58/x
  3. Step 3: Cross multiply
    2,740.91x = 4,110.42 × 891.58
  4. Step 4: Simplify right side
    2,740.91x = 3,664,778.09
  5. Step 5: Solve for x
    x = 3,664,778.09/2,740.91
  6. Step 6: Final answer
    x = 1,337.06

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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.