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Finding the Fourth Proportional to 6,406, 9,612.78 and 2,708

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Solution

The fourth proportional to 6,406, 9,612.78 and 2,708 is: 4,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,406 : 9,612.78 = 2,708 : x
  2. Step 2: Convert to fraction form
    6,406/9,612.78 = 2,708/x
  3. Step 3: Cross multiply
    6,406x = 9,612.78 × 2,708
  4. Step 4: Simplify right side
    6,406x = 26,031,408.24
  5. Step 5: Solve for x
    x = 26,031,408.24/6,406
  6. Step 6: Final answer
    x = 4,063.60

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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.