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Finding the Fourth Proportional to 3.18, 4.75 and 3.16

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Solution

The fourth proportional to 3.18, 4.75 and 3.16 is: 4.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.18 : 4.75 = 3.16 : x
  2. Step 2: Convert to fraction form
    3.18/4.75 = 3.16/x
  3. Step 3: Cross multiply
    3.18x = 4.75 × 3.16
  4. Step 4: Simplify right side
    3.18x = 15.02
  5. Step 5: Solve for x
    x = 15.02/3.18
  6. Step 6: Final answer
    x = 4.72

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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.