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Finding the Fourth Proportional to 219.84, 328.16 and 192.50

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Solution

The fourth proportional to 219.84, 328.16 and 192.50 is: 287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.84 : 328.16 = 192.50 : x
  2. Step 2: Convert to fraction form
    219.84/328.16 = 192.50/x
  3. Step 3: Cross multiply
    219.84x = 328.16 × 192.50
  4. Step 4: Simplify right side
    219.84x = 63,170.80
  5. Step 5: Solve for x
    x = 63,170.80/219.84
  6. Step 6: Final answer
    x = 287.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.