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Finding the Fourth Proportional to 211.65, 317.50 and 96.18

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Solution

The fourth proportional to 211.65, 317.50 and 96.18 is: 144.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.65 : 317.50 = 96.18 : x
  2. Step 2: Convert to fraction form
    211.65/317.50 = 96.18/x
  3. Step 3: Cross multiply
    211.65x = 317.50 × 96.18
  4. Step 4: Simplify right side
    211.65x = 30,537.15
  5. Step 5: Solve for x
    x = 30,537.15/211.65
  6. Step 6: Final answer
    x = 144.28

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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.