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Finding the Fourth Proportional to 315.55, 435.30 and 204.99

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Solution

The fourth proportional to 315.55, 435.30 and 204.99 is: 282.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.55 : 435.30 = 204.99 : x
  2. Step 2: Convert to fraction form
    315.55/435.30 = 204.99/x
  3. Step 3: Cross multiply
    315.55x = 435.30 × 204.99
  4. Step 4: Simplify right side
    315.55x = 89,231.06
  5. Step 5: Solve for x
    x = 89,231.06/315.55
  6. Step 6: Final answer
    x = 282.78

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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.