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Finding the Fourth Proportional to 35.29, 48.72 and 28.05

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Solution

The fourth proportional to 35.29, 48.72 and 28.05 is: 38.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.29 : 48.72 = 28.05 : x
  2. Step 2: Convert to fraction form
    35.29/48.72 = 28.05/x
  3. Step 3: Cross multiply
    35.29x = 48.72 × 28.05
  4. Step 4: Simplify right side
    35.29x = 1,366.60
  5. Step 5: Solve for x
    x = 1,366.60/35.29
  6. Step 6: Final answer
    x = 38.72

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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.