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Finding the Fourth Proportional to 368.38, 508.43 and 213.13

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Solution

The fourth proportional to 368.38, 508.43 and 213.13 is: 294.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.38 : 508.43 = 213.13 : x
  2. Step 2: Convert to fraction form
    368.38/508.43 = 213.13/x
  3. Step 3: Cross multiply
    368.38x = 508.43 × 213.13
  4. Step 4: Simplify right side
    368.38x = 108,358.08
  5. Step 5: Solve for x
    x = 108,358.08/368.38
  6. Step 6: Final answer
    x = 294.15

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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.