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Finding the Fourth Proportional to 211.92, 317.78 and 177.88

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Solution

The fourth proportional to 211.92, 317.78 and 177.88 is: 266.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.92 : 317.78 = 177.88 : x
  2. Step 2: Convert to fraction form
    211.92/317.78 = 177.88/x
  3. Step 3: Cross multiply
    211.92x = 317.78 × 177.88
  4. Step 4: Simplify right side
    211.92x = 56,526.71
  5. Step 5: Solve for x
    x = 56,526.71/211.92
  6. Step 6: Final answer
    x = 266.74

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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.