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Finding the Fourth Proportional to 216.88, 299.40 and 148.24

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Solution

The fourth proportional to 216.88, 299.40 and 148.24 is: 204.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.88 : 299.40 = 148.24 : x
  2. Step 2: Convert to fraction form
    216.88/299.40 = 148.24/x
  3. Step 3: Cross multiply
    216.88x = 299.40 × 148.24
  4. Step 4: Simplify right side
    216.88x = 44,383.06
  5. Step 5: Solve for x
    x = 44,383.06/216.88
  6. Step 6: Final answer
    x = 204.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.