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Finding the Fourth Proportional to 315.65, 473.38 and 110.21

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Solution

The fourth proportional to 315.65, 473.38 and 110.21 is: 165.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.65 : 473.38 = 110.21 : x
  2. Step 2: Convert to fraction form
    315.65/473.38 = 110.21/x
  3. Step 3: Cross multiply
    315.65x = 473.38 × 110.21
  4. Step 4: Simplify right side
    315.65x = 52,171.21
  5. Step 5: Solve for x
    x = 52,171.21/315.65
  6. Step 6: Final answer
    x = 165.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.