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Finding the Fourth Proportional to 2,670.08, 4,006.90 and 938.72

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Solution

The fourth proportional to 2,670.08, 4,006.90 and 938.72 is: 1,408.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670.08 : 4,006.90 = 938.72 : x
  2. Step 2: Convert to fraction form
    2,670.08/4,006.90 = 938.72/x
  3. Step 3: Cross multiply
    2,670.08x = 4,006.90 × 938.72
  4. Step 4: Simplify right side
    2,670.08x = 3,761,357.17
  5. Step 5: Solve for x
    x = 3,761,357.17/2,670.08
  6. Step 6: Final answer
    x = 1,408.71

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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.