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Finding the Fourth Proportional to 366.40, 505.79 and 216.98

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Solution

The fourth proportional to 366.40, 505.79 and 216.98 is: 299.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.40 : 505.79 = 216.98 : x
  2. Step 2: Convert to fraction form
    366.40/505.79 = 216.98/x
  3. Step 3: Cross multiply
    366.40x = 505.79 × 216.98
  4. Step 4: Simplify right side
    366.40x = 109,746.31
  5. Step 5: Solve for x
    x = 109,746.31/366.40
  6. Step 6: Final answer
    x = 299.53

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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.