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Finding the Fourth Proportional to 671,137, 926,169.21 and 369,331

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Solution

The fourth proportional to 671,137, 926,169.21 and 369,331 is: 509,676.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,137 : 926,169.21 = 369,331 : x
  2. Step 2: Convert to fraction form
    671,137/926,169.21 = 369,331/x
  3. Step 3: Cross multiply
    671,137x = 926,169.21 × 369,331
  4. Step 4: Simplify right side
    671,137x = 342,063,000,498.51
  5. Step 5: Solve for x
    x = 342,063,000,498.51/671,137
  6. Step 6: Final answer
    x = 509,676.86

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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.