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Finding the Fourth Proportional to 315.56, 435.89 and 263.28

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Solution

The fourth proportional to 315.56, 435.89 and 263.28 is: 363.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.56 : 435.89 = 263.28 : x
  2. Step 2: Convert to fraction form
    315.56/435.89 = 263.28/x
  3. Step 3: Cross multiply
    315.56x = 435.89 × 263.28
  4. Step 4: Simplify right side
    315.56x = 114,759.80
  5. Step 5: Solve for x
    x = 114,759.80/315.56
  6. Step 6: Final answer
    x = 363.68

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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.