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Finding the Fourth Proportional to 5.97, 8.91 and 5.21

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Solution

The fourth proportional to 5.97, 8.91 and 5.21 is: 7.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.97 : 8.91 = 5.21 : x
  2. Step 2: Convert to fraction form
    5.97/8.91 = 5.21/x
  3. Step 3: Cross multiply
    5.97x = 8.91 × 5.21
  4. Step 4: Simplify right side
    5.97x = 46.38
  5. Step 5: Solve for x
    x = 46.38/5.97
  6. Step 6: Final answer
    x = 7.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.