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Finding the Fourth Proportional to 331.01, 455.70 and 275.65

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Solution

The fourth proportional to 331.01, 455.70 and 275.65 is: 379.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.01 : 455.70 = 275.65 : x
  2. Step 2: Convert to fraction form
    331.01/455.70 = 275.65/x
  3. Step 3: Cross multiply
    331.01x = 455.70 × 275.65
  4. Step 4: Simplify right side
    331.01x = 125,615.39
  5. Step 5: Solve for x
    x = 125,615.39/331.01
  6. Step 6: Final answer
    x = 379.49

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.