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Finding the Fourth Proportional to 443,513.20, 665,269.80 and 218,908.30

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Solution

The fourth proportional to 443,513.20, 665,269.80 and 218,908.30 is: 328,362.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,513.20 : 665,269.80 = 218,908.30 : x
  2. Step 2: Convert to fraction form
    443,513.20/665,269.80 = 218,908.30/x
  3. Step 3: Cross multiply
    443,513.20x = 665,269.80 × 218,908.30
  4. Step 4: Simplify right side
    443,513.20x = 145,633,080,959.34
  5. Step 5: Solve for x
    x = 145,633,080,959.34/443,513.20
  6. Step 6: Final answer
    x = 328,362.45

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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.