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Finding the Fourth Proportional to 50.19, 75.30 and 40.65

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Solution

The fourth proportional to 50.19, 75.30 and 40.65 is: 60.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.19 : 75.30 = 40.65 : x
  2. Step 2: Convert to fraction form
    50.19/75.30 = 40.65/x
  3. Step 3: Cross multiply
    50.19x = 75.30 × 40.65
  4. Step 4: Simplify right side
    50.19x = 3,061.28
  5. Step 5: Solve for x
    x = 3,061.28/50.19
  6. Step 6: Final answer
    x = 60.99

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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.