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Finding the Fourth Proportional to 50.30, 75.30 and 45.49

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Solution

The fourth proportional to 50.30, 75.30 and 45.49 is: 68.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.30 : 75.30 = 45.49 : x
  2. Step 2: Convert to fraction form
    50.30/75.30 = 45.49/x
  3. Step 3: Cross multiply
    50.30x = 75.30 × 45.49
  4. Step 4: Simplify right side
    50.30x = 3,425.47
  5. Step 5: Solve for x
    x = 3,425.47/50.30
  6. Step 6: Final answer
    x = 68.11

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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.