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Finding the Fourth Proportional to 219.45, 302.98 and 153.04

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Solution

The fourth proportional to 219.45, 302.98 and 153.04 is: 211.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.45 : 302.98 = 153.04 : x
  2. Step 2: Convert to fraction form
    219.45/302.98 = 153.04/x
  3. Step 3: Cross multiply
    219.45x = 302.98 × 153.04
  4. Step 4: Simplify right side
    219.45x = 46,366.54
  5. Step 5: Solve for x
    x = 46,366.54/219.45
  6. Step 6: Final answer
    x = 211.29

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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.