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Finding the Fourth Proportional to 216.18, 298.08 and 160.74

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Solution

The fourth proportional to 216.18, 298.08 and 160.74 is: 221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.18 : 298.08 = 160.74 : x
  2. Step 2: Convert to fraction form
    216.18/298.08 = 160.74/x
  3. Step 3: Cross multiply
    216.18x = 298.08 × 160.74
  4. Step 4: Simplify right side
    216.18x = 47,913.38
  5. Step 5: Solve for x
    x = 47,913.38/216.18
  6. Step 6: Final answer
    x = 221.64

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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.