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Finding the Fourth Proportional to 4.30, 6.42 and 3.30

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Solution

The fourth proportional to 4.30, 6.42 and 3.30 is: 4.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.30 : 6.42 = 3.30 : x
  2. Step 2: Convert to fraction form
    4.30/6.42 = 3.30/x
  3. Step 3: Cross multiply
    4.30x = 6.42 × 3.30
  4. Step 4: Simplify right side
    4.30x = 21.19
  5. Step 5: Solve for x
    x = 21.19/4.30
  6. Step 6: Final answer
    x = 4.93

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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.