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Finding the Fourth Proportional to 5.69, 7.84 and 5.47

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Solution

The fourth proportional to 5.69, 7.84 and 5.47 is: 7.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.69 : 7.84 = 5.47 : x
  2. Step 2: Convert to fraction form
    5.69/7.84 = 5.47/x
  3. Step 3: Cross multiply
    5.69x = 7.84 × 5.47
  4. Step 4: Simplify right side
    5.69x = 42.88
  5. Step 5: Solve for x
    x = 42.88/5.69
  6. Step 6: Final answer
    x = 7.54

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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.