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Finding the Fourth Proportional to 2,665.70, 3,998.55 and 934.10

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Solution

The fourth proportional to 2,665.70, 3,998.55 and 934.10 is: 1,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.70 : 3,998.55 = 934.10 : x
  2. Step 2: Convert to fraction form
    2,665.70/3,998.55 = 934.10/x
  3. Step 3: Cross multiply
    2,665.70x = 3,998.55 × 934.10
  4. Step 4: Simplify right side
    2,665.70x = 3,735,045.56
  5. Step 5: Solve for x
    x = 3,735,045.56/2,665.70
  6. Step 6: Final answer
    x = 1,401.15

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Similar ratio
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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.