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Finding the Fourth Proportional to 211.74, 318.96 and 184.60

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Solution

The fourth proportional to 211.74, 318.96 and 184.60 is: 278.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.74 : 318.96 = 184.60 : x
  2. Step 2: Convert to fraction form
    211.74/318.96 = 184.60/x
  3. Step 3: Cross multiply
    211.74x = 318.96 × 184.60
  4. Step 4: Simplify right side
    211.74x = 58,880.02
  5. Step 5: Solve for x
    x = 58,880.02/211.74
  6. Step 6: Final answer
    x = 278.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.