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Finding the Fourth Proportional to 6.21, 8.56 and 3.48

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Solution

The fourth proportional to 6.21, 8.56 and 3.48 is: 4.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.21 : 8.56 = 3.48 : x
  2. Step 2: Convert to fraction form
    6.21/8.56 = 3.48/x
  3. Step 3: Cross multiply
    6.21x = 8.56 × 3.48
  4. Step 4: Simplify right side
    6.21x = 29.77
  5. Step 5: Solve for x
    x = 29.77/6.21
  6. Step 6: Final answer
    x = 4.80

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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.