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Finding the Fourth Proportional to 211.68, 318.60 and 192.24

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Solution

The fourth proportional to 211.68, 318.60 and 192.24 is: 289.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.68 : 318.60 = 192.24 : x
  2. Step 2: Convert to fraction form
    211.68/318.60 = 192.24/x
  3. Step 3: Cross multiply
    211.68x = 318.60 × 192.24
  4. Step 4: Simplify right side
    211.68x = 61,247.66
  5. Step 5: Solve for x
    x = 61,247.66/211.68
  6. Step 6: Final answer
    x = 289.34

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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.