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Finding the Fourth Proportional to 443.78, 612.39 and 247.30

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Solution

The fourth proportional to 443.78, 612.39 and 247.30 is: 341.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.78 : 612.39 = 247.30 : x
  2. Step 2: Convert to fraction form
    443.78/612.39 = 247.30/x
  3. Step 3: Cross multiply
    443.78x = 612.39 × 247.30
  4. Step 4: Simplify right side
    443.78x = 151,444.05
  5. Step 5: Solve for x
    x = 151,444.05/443.78
  6. Step 6: Final answer
    x = 341.26

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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.