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Finding the Fourth Proportional to 5.89, 8.88 and 4.78

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Solution

The fourth proportional to 5.89, 8.88 and 4.78 is: 7.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.89 : 8.88 = 4.78 : x
  2. Step 2: Convert to fraction form
    5.89/8.88 = 4.78/x
  3. Step 3: Cross multiply
    5.89x = 8.88 × 4.78
  4. Step 4: Simplify right side
    5.89x = 42.39
  5. Step 5: Solve for x
    x = 42.39/5.89
  6. Step 6: Final answer
    x = 7.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.