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Finding the Fourth Proportional to 51.28, 70.68 and 43.99

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Solution

The fourth proportional to 51.28, 70.68 and 43.99 is: 60.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.28 : 70.68 = 43.99 : x
  2. Step 2: Convert to fraction form
    51.28/70.68 = 43.99/x
  3. Step 3: Cross multiply
    51.28x = 70.68 × 43.99
  4. Step 4: Simplify right side
    51.28x = 3,109.21
  5. Step 5: Solve for x
    x = 3,109.21/51.28
  6. Step 6: Final answer
    x = 60.63

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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.