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Finding the Fourth Proportional to 219.55, 303.21 and 149.93

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Solution

The fourth proportional to 219.55, 303.21 and 149.93 is: 207.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.55 : 303.21 = 149.93 : x
  2. Step 2: Convert to fraction form
    219.55/303.21 = 149.93/x
  3. Step 3: Cross multiply
    219.55x = 303.21 × 149.93
  4. Step 4: Simplify right side
    219.55x = 45,460.28
  5. Step 5: Solve for x
    x = 45,460.28/219.55
  6. Step 6: Final answer
    x = 207.06

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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.