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Finding the Fourth Proportional to 219.05, 328.45 and 64.95

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Solution

The fourth proportional to 219.05, 328.45 and 64.95 is: 97.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.05 : 328.45 = 64.95 : x
  2. Step 2: Convert to fraction form
    219.05/328.45 = 64.95/x
  3. Step 3: Cross multiply
    219.05x = 328.45 × 64.95
  4. Step 4: Simplify right side
    219.05x = 21,332.91
  5. Step 5: Solve for x
    x = 21,332.91/219.05
  6. Step 6: Final answer
    x = 97.39

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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.