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Finding the Fourth Proportional to 4,408, 6,612.56 and 1,330

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Solution

The fourth proportional to 4,408, 6,612.56 and 1,330 is: 1,995.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,408 : 6,612.56 = 1,330 : x
  2. Step 2: Convert to fraction form
    4,408/6,612.56 = 1,330/x
  3. Step 3: Cross multiply
    4,408x = 6,612.56 × 1,330
  4. Step 4: Simplify right side
    4,408x = 8,794,704.80
  5. Step 5: Solve for x
    x = 8,794,704.80/4,408
  6. Step 6: Final answer
    x = 1,995.17

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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.