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Finding the Fourth Proportional to 315.29, 435.38 and 304.96

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Solution

The fourth proportional to 315.29, 435.38 and 304.96 is: 421.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.29 : 435.38 = 304.96 : x
  2. Step 2: Convert to fraction form
    315.29/435.38 = 304.96/x
  3. Step 3: Cross multiply
    315.29x = 435.38 × 304.96
  4. Step 4: Simplify right side
    315.29x = 132,772.50
  5. Step 5: Solve for x
    x = 132,772.50/315.29
  6. Step 6: Final answer
    x = 421.11

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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.