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Finding the Fourth Proportional to 51.42, 70.88 and 38.46

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Solution

The fourth proportional to 51.42, 70.88 and 38.46 is: 53.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.42 : 70.88 = 38.46 : x
  2. Step 2: Convert to fraction form
    51.42/70.88 = 38.46/x
  3. Step 3: Cross multiply
    51.42x = 70.88 × 38.46
  4. Step 4: Simplify right side
    51.42x = 2,725.85
  5. Step 5: Solve for x
    x = 2,725.85/51.42
  6. Step 6: Final answer
    x = 53.01

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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.