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Finding the Fourth Proportional to 212.06, 317.46 and 157.08

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Solution

The fourth proportional to 212.06, 317.46 and 157.08 is: 235.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.06 : 317.46 = 157.08 : x
  2. Step 2: Convert to fraction form
    212.06/317.46 = 157.08/x
  3. Step 3: Cross multiply
    212.06x = 317.46 × 157.08
  4. Step 4: Simplify right side
    212.06x = 49,866.62
  5. Step 5: Solve for x
    x = 49,866.62/212.06
  6. Step 6: Final answer
    x = 235.15

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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.