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Finding the Fourth Proportional to 671,458.22, 926,468.69 and 399,472.97

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Solution

The fourth proportional to 671,458.22, 926,468.69 and 399,472.97 is: 551,187.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,458.22 : 926,468.69 = 399,472.97 : x
  2. Step 2: Convert to fraction form
    671,458.22/926,468.69 = 399,472.97/x
  3. Step 3: Cross multiply
    671,458.22x = 926,468.69 × 399,472.97
  4. Step 4: Simplify right side
    671,458.22x = 370,099,192,576.60
  5. Step 5: Solve for x
    x = 370,099,192,576.60/671,458.22
  6. Step 6: Final answer
    x = 551,187.22

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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.