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Finding the Fourth Proportional to 443.69, 612.30 and 247.20

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Solution

The fourth proportional to 443.69, 612.30 and 247.20 is: 341.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.69 : 612.30 = 247.20 : x
  2. Step 2: Convert to fraction form
    443.69/612.30 = 247.20/x
  3. Step 3: Cross multiply
    443.69x = 612.30 × 247.20
  4. Step 4: Simplify right side
    443.69x = 151,360.56
  5. Step 5: Solve for x
    x = 151,360.56/443.69
  6. Step 6: Final answer
    x = 341.14

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Double scale
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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.