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Finding the Fourth Proportional to 35.55, 48.78 and 33.12

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Solution

The fourth proportional to 35.55, 48.78 and 33.12 is: 45.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.55 : 48.78 = 33.12 : x
  2. Step 2: Convert to fraction form
    35.55/48.78 = 33.12/x
  3. Step 3: Cross multiply
    35.55x = 48.78 × 33.12
  4. Step 4: Simplify right side
    35.55x = 1,615.59
  5. Step 5: Solve for x
    x = 1,615.59/35.55
  6. Step 6: Final answer
    x = 45.45

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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.