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Finding the Fourth Proportional to 443.65, 612.21 and 247.15

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Solution

The fourth proportional to 443.65, 612.21 and 247.15 is: 341.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.65 : 612.21 = 247.15 : x
  2. Step 2: Convert to fraction form
    443.65/612.21 = 247.15/x
  3. Step 3: Cross multiply
    443.65x = 612.21 × 247.15
  4. Step 4: Simplify right side
    443.65x = 151,307.70
  5. Step 5: Solve for x
    x = 151,307.70/443.65
  6. Step 6: Final answer
    x = 341.05

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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.