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Finding the Fourth Proportional to 448,639.71, 673,275.20 and 405,760.88

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Solution

The fourth proportional to 448,639.71, 673,275.20 and 405,760.88 is: 608,926.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,639.71 : 673,275.20 = 405,760.88 : x
  2. Step 2: Convert to fraction form
    448,639.71/673,275.20 = 405,760.88/x
  3. Step 3: Cross multiply
    448,639.71x = 673,275.20 × 405,760.88
  4. Step 4: Simplify right side
    448,639.71x = 273,188,732,239.00
  5. Step 5: Solve for x
    x = 273,188,732,239.00/448,639.71
  6. Step 6: Final answer
    x = 608,926.78

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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.