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Finding the Fourth Proportional to 6, 8.28 and 5.55

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Solution

The fourth proportional to 6, 8.28 and 5.55 is: 7.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6 : 8.28 = 5.55 : x
  2. Step 2: Convert to fraction form
    6/8.28 = 5.55/x
  3. Step 3: Cross multiply
    6x = 8.28 × 5.55
  4. Step 4: Simplify right side
    6x = 45.91
  5. Step 5: Solve for x
    x = 45.91/6
  6. Step 6: Final answer
    x = 7.65

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1.5x scale

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.