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Finding the Fourth Proportional to 50.76, 76.68 and 50.31

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Solution

The fourth proportional to 50.76, 76.68 and 50.31 is: 76.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.76 : 76.68 = 50.31 : x
  2. Step 2: Convert to fraction form
    50.76/76.68 = 50.31/x
  3. Step 3: Cross multiply
    50.76x = 76.68 × 50.31
  4. Step 4: Simplify right side
    50.76x = 3,857.77
  5. Step 5: Solve for x
    x = 3,857.77/50.76
  6. Step 6: Final answer
    x = 76.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.