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Finding the Fourth Proportional to 5.02, 6.88 and 4.90

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Solution

The fourth proportional to 5.02, 6.88 and 4.90 is: 6.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.02 : 6.88 = 4.90 : x
  2. Step 2: Convert to fraction form
    5.02/6.88 = 4.90/x
  3. Step 3: Cross multiply
    5.02x = 6.88 × 4.90
  4. Step 4: Simplify right side
    5.02x = 33.71
  5. Step 5: Solve for x
    x = 33.71/5.02
  6. Step 6: Final answer
    x = 6.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.