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Finding the Fourth Proportional to 6.48, 8.92 and 6.21

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Solution

The fourth proportional to 6.48, 8.92 and 6.21 is: 8.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.48 : 8.92 = 6.21 : x
  2. Step 2: Convert to fraction form
    6.48/8.92 = 6.21/x
  3. Step 3: Cross multiply
    6.48x = 8.92 × 6.21
  4. Step 4: Simplify right side
    6.48x = 55.39
  5. Step 5: Solve for x
    x = 55.39/6.48
  6. Step 6: Final answer
    x = 8.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.