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Finding the Fourth Proportional to 368.76, 508.90 and 213.56

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Solution

The fourth proportional to 368.76, 508.90 and 213.56 is: 294.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.76 : 508.90 = 213.56 : x
  2. Step 2: Convert to fraction form
    368.76/508.90 = 213.56/x
  3. Step 3: Cross multiply
    368.76x = 508.90 × 213.56
  4. Step 4: Simplify right side
    368.76x = 108,680.68
  5. Step 5: Solve for x
    x = 108,680.68/368.76
  6. Step 6: Final answer
    x = 294.72

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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.