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Finding the Fourth Proportional to 443.63, 612.15 and 247.11

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Solution

The fourth proportional to 443.63, 612.15 and 247.11 is: 340.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.63 : 612.15 = 247.11 : x
  2. Step 2: Convert to fraction form
    443.63/612.15 = 247.11/x
  3. Step 3: Cross multiply
    443.63x = 612.15 × 247.11
  4. Step 4: Simplify right side
    443.63x = 151,268.39
  5. Step 5: Solve for x
    x = 151,268.39/443.63
  6. Step 6: Final answer
    x = 340.98

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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.