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Finding the Fourth Proportional to 35.42, 48.88 and 30.83

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Solution

The fourth proportional to 35.42, 48.88 and 30.83 is: 42.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.42 : 48.88 = 30.83 : x
  2. Step 2: Convert to fraction form
    35.42/48.88 = 30.83/x
  3. Step 3: Cross multiply
    35.42x = 48.88 × 30.83
  4. Step 4: Simplify right side
    35.42x = 1,506.97
  5. Step 5: Solve for x
    x = 1,506.97/35.42
  6. Step 6: Final answer
    x = 42.55

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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.