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Finding the Fourth Proportional to 50.70, 76.46 and 48.30

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Solution

The fourth proportional to 50.70, 76.46 and 48.30 is: 72.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.70 : 76.46 = 48.30 : x
  2. Step 2: Convert to fraction form
    50.70/76.46 = 48.30/x
  3. Step 3: Cross multiply
    50.70x = 76.46 × 48.30
  4. Step 4: Simplify right side
    50.70x = 3,693.02
  5. Step 5: Solve for x
    x = 3,693.02/50.70
  6. Step 6: Final answer
    x = 72.84

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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.