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Finding the Fourth Proportional to 443,636.80, 665,455.20 and 207,003.40

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Solution

The fourth proportional to 443,636.80, 665,455.20 and 207,003.40 is: 310,505.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,636.80 : 665,455.20 = 207,003.40 : x
  2. Step 2: Convert to fraction form
    443,636.80/665,455.20 = 207,003.40/x
  3. Step 3: Cross multiply
    443,636.80x = 665,455.20 × 207,003.40
  4. Step 4: Simplify right side
    443,636.80x = 137,751,488,947.68
  5. Step 5: Solve for x
    x = 137,751,488,947.68/443,636.80
  6. Step 6: Final answer
    x = 310,505.10

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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.