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Finding the Fourth Proportional to 2,605.96, 3,908.94 and 874.58

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Solution

The fourth proportional to 2,605.96, 3,908.94 and 874.58 is: 1,311.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.96 : 3,908.94 = 874.58 : x
  2. Step 2: Convert to fraction form
    2,605.96/3,908.94 = 874.58/x
  3. Step 3: Cross multiply
    2,605.96x = 3,908.94 × 874.58
  4. Step 4: Simplify right side
    2,605.96x = 3,418,680.75
  5. Step 5: Solve for x
    x = 3,418,680.75/2,605.96
  6. Step 6: Final answer
    x = 1,311.87

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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.