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Finding the Fourth Proportional to 264.30, 365.08 and 215.78

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Solution

The fourth proportional to 264.30, 365.08 and 215.78 is: 298.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.30 : 365.08 = 215.78 : x
  2. Step 2: Convert to fraction form
    264.30/365.08 = 215.78/x
  3. Step 3: Cross multiply
    264.30x = 365.08 × 215.78
  4. Step 4: Simplify right side
    264.30x = 78,776.96
  5. Step 5: Solve for x
    x = 78,776.96/264.30
  6. Step 6: Final answer
    x = 298.06

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Why These Related Problems?

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