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Finding the Fourth Proportional to 419.80, 630.22 and 246.55

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Solution

The fourth proportional to 419.80, 630.22 and 246.55 is: 370.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.80 : 630.22 = 246.55 : x
  2. Step 2: Convert to fraction form
    419.80/630.22 = 246.55/x
  3. Step 3: Cross multiply
    419.80x = 630.22 × 246.55
  4. Step 4: Simplify right side
    419.80x = 155,380.74
  5. Step 5: Solve for x
    x = 155,380.74/419.80
  6. Step 6: Final answer
    x = 370.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.