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Finding the Fourth Proportional to 211.90, 318.20 and 184.76

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Solution

The fourth proportional to 211.90, 318.20 and 184.76 is: 277.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.90 : 318.20 = 184.76 : x
  2. Step 2: Convert to fraction form
    211.90/318.20 = 184.76/x
  3. Step 3: Cross multiply
    211.90x = 318.20 × 184.76
  4. Step 4: Simplify right side
    211.90x = 58,790.63
  5. Step 5: Solve for x
    x = 58,790.63/211.90
  6. Step 6: Final answer
    x = 277.45

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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.