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Finding the Fourth Proportional to 4.79, 6.62 and 3.99

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Solution

The fourth proportional to 4.79, 6.62 and 3.99 is: 5.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.79 : 6.62 = 3.99 : x
  2. Step 2: Convert to fraction form
    4.79/6.62 = 3.99/x
  3. Step 3: Cross multiply
    4.79x = 6.62 × 3.99
  4. Step 4: Simplify right side
    4.79x = 26.39
  5. Step 5: Solve for x
    x = 26.39/4.79
  6. Step 6: Final answer
    x = 5.51

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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.