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Finding the Fourth Proportional to 366.48, 505.60 and 211.20

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Solution

The fourth proportional to 366.48, 505.60 and 211.20 is: 291.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.48 : 505.60 = 211.20 : x
  2. Step 2: Convert to fraction form
    366.48/505.60 = 211.20/x
  3. Step 3: Cross multiply
    366.48x = 505.60 × 211.20
  4. Step 4: Simplify right side
    366.48x = 106,782.72
  5. Step 5: Solve for x
    x = 106,782.72/366.48
  6. Step 6: Final answer
    x = 291.37

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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.