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Finding the Fourth Proportional to 370.49, 511.20 and 213.09

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Solution

The fourth proportional to 370.49, 511.20 and 213.09 is: 294.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.49 : 511.20 = 213.09 : x
  2. Step 2: Convert to fraction form
    370.49/511.20 = 213.09/x
  3. Step 3: Cross multiply
    370.49x = 511.20 × 213.09
  4. Step 4: Simplify right side
    370.49x = 108,931.61
  5. Step 5: Solve for x
    x = 108,931.61/370.49
  6. Step 6: Final answer
    x = 294.02

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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.