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Finding the Fourth Proportional to 443.18, 661.78 and 362.18

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Solution

The fourth proportional to 443.18, 661.78 and 362.18 is: 540.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.18 : 661.78 = 362.18 : x
  2. Step 2: Convert to fraction form
    443.18/661.78 = 362.18/x
  3. Step 3: Cross multiply
    443.18x = 661.78 × 362.18
  4. Step 4: Simplify right side
    443.18x = 239,683.48
  5. Step 5: Solve for x
    x = 239,683.48/443.18
  6. Step 6: Final answer
    x = 540.83

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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.