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Finding the Fourth Proportional to 50.93, 76.31 and 40.05

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Solution

The fourth proportional to 50.93, 76.31 and 40.05 is: 60.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.93 : 76.31 = 40.05 : x
  2. Step 2: Convert to fraction form
    50.93/76.31 = 40.05/x
  3. Step 3: Cross multiply
    50.93x = 76.31 × 40.05
  4. Step 4: Simplify right side
    50.93x = 3,056.02
  5. Step 5: Solve for x
    x = 3,056.02/50.93
  6. Step 6: Final answer
    x = 60.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.