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Finding the Fourth Proportional to 401.86, 602.34 and 219.34

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Solution

The fourth proportional to 401.86, 602.34 and 219.34 is: 328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.86 : 602.34 = 219.34 : x
  2. Step 2: Convert to fraction form
    401.86/602.34 = 219.34/x
  3. Step 3: Cross multiply
    401.86x = 602.34 × 219.34
  4. Step 4: Simplify right side
    401.86x = 132,117.26
  5. Step 5: Solve for x
    x = 132,117.26/401.86
  6. Step 6: Final answer
    x = 328.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.