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Finding the Fourth Proportional to 219.45, 302.56 and 154.04

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Solution

The fourth proportional to 219.45, 302.56 and 154.04 is: 212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.45 : 302.56 = 154.04 : x
  2. Step 2: Convert to fraction form
    219.45/302.56 = 154.04/x
  3. Step 3: Cross multiply
    219.45x = 302.56 × 154.04
  4. Step 4: Simplify right side
    219.45x = 46,606.71
  5. Step 5: Solve for x
    x = 46,606.71/219.45
  6. Step 6: Final answer
    x = 212.38

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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.