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Finding the Fourth Proportional to 315.28, 436.20 and 300.88

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Solution

The fourth proportional to 315.28, 436.20 and 300.88 is: 416.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.28 : 436.20 = 300.88 : x
  2. Step 2: Convert to fraction form
    315.28/436.20 = 300.88/x
  3. Step 3: Cross multiply
    315.28x = 436.20 × 300.88
  4. Step 4: Simplify right side
    315.28x = 131,243.86
  5. Step 5: Solve for x
    x = 131,243.86/315.28
  6. Step 6: Final answer
    x = 416.28

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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.