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Finding the Fourth Proportional to 50.79, 75.75 and 40.61

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Solution

The fourth proportional to 50.79, 75.75 and 40.61 is: 60.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.79 : 75.75 = 40.61 : x
  2. Step 2: Convert to fraction form
    50.79/75.75 = 40.61/x
  3. Step 3: Cross multiply
    50.79x = 75.75 × 40.61
  4. Step 4: Simplify right side
    50.79x = 3,075.83
  5. Step 5: Solve for x
    x = 3,075.83/50.79
  6. Step 6: Final answer
    x = 60.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.