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Finding the Fourth Proportional to 219.34, 330.13 and 207.58

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Solution

The fourth proportional to 219.34, 330.13 and 207.58 is: 312.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.34 : 330.13 = 207.58 : x
  2. Step 2: Convert to fraction form
    219.34/330.13 = 207.58/x
  3. Step 3: Cross multiply
    219.34x = 330.13 × 207.58
  4. Step 4: Simplify right side
    219.34x = 68,528.39
  5. Step 5: Solve for x
    x = 68,528.39/219.34
  6. Step 6: Final answer
    x = 312.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.