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Finding the Fourth Proportional to 245.40, 366.34 and 213.13

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Solution

The fourth proportional to 245.40, 366.34 and 213.13 is: 318.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.40 : 366.34 = 213.13 : x
  2. Step 2: Convert to fraction form
    245.40/366.34 = 213.13/x
  3. Step 3: Cross multiply
    245.40x = 366.34 × 213.13
  4. Step 4: Simplify right side
    245.40x = 78,076.31
  5. Step 5: Solve for x
    x = 78,076.31/245.40
  6. Step 6: Final answer
    x = 318.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.