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Finding the Fourth Proportional to 51.07, 70.46 and 30.32

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Solution

The fourth proportional to 51.07, 70.46 and 30.32 is: 41.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.07 : 70.46 = 30.32 : x
  2. Step 2: Convert to fraction form
    51.07/70.46 = 30.32/x
  3. Step 3: Cross multiply
    51.07x = 70.46 × 30.32
  4. Step 4: Simplify right side
    51.07x = 2,136.20
  5. Step 5: Solve for x
    x = 2,136.20/51.07
  6. Step 6: Final answer
    x = 41.83

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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.