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Finding the Fourth Proportional to 315.76, 436.16 and 242.97

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Solution

The fourth proportional to 315.76, 436.16 and 242.97 is: 335.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.76 : 436.16 = 242.97 : x
  2. Step 2: Convert to fraction form
    315.76/436.16 = 242.97/x
  3. Step 3: Cross multiply
    315.76x = 436.16 × 242.97
  4. Step 4: Simplify right side
    315.76x = 105,973.80
  5. Step 5: Solve for x
    x = 105,973.80/315.76
  6. Step 6: Final answer
    x = 335.62

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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.