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Finding the Fourth Proportional to 443,637.20, 665,455.80 and 266,490.20

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Solution

The fourth proportional to 443,637.20, 665,455.80 and 266,490.20 is: 399,735.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,637.20 : 665,455.80 = 266,490.20 : x
  2. Step 2: Convert to fraction form
    443,637.20/665,455.80 = 266,490.20/x
  3. Step 3: Cross multiply
    443,637.20x = 665,455.80 × 266,490.20
  4. Step 4: Simplify right side
    443,637.20x = 177,337,449,233.16
  5. Step 5: Solve for x
    x = 177,337,449,233.16/443,637.20
  6. Step 6: Final answer
    x = 399,735.30

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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.