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Finding the Fourth Proportional to 38.58, 53.46 and 38.00

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Solution

The fourth proportional to 38.58, 53.46 and 38.00 is: 52.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.58 : 53.46 = 38.00 : x
  2. Step 2: Convert to fraction form
    38.58/53.46 = 38.00/x
  3. Step 3: Cross multiply
    38.58x = 53.46 × 38.00
  4. Step 4: Simplify right side
    38.58x = 2,031.21
  5. Step 5: Solve for x
    x = 2,031.21/38.58
  6. Step 6: Final answer
    x = 52.65

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.