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Finding the Fourth Proportional to 315.45, 435.18 and 204.90

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Solution

The fourth proportional to 315.45, 435.18 and 204.90 is: 282.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.45 : 435.18 = 204.90 : x
  2. Step 2: Convert to fraction form
    315.45/435.18 = 204.90/x
  3. Step 3: Cross multiply
    315.45x = 435.18 × 204.90
  4. Step 4: Simplify right side
    315.45x = 89,168.38
  5. Step 5: Solve for x
    x = 89,168.38/315.45
  6. Step 6: Final answer
    x = 282.67

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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.