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Finding the Fourth Proportional to 639,690, 882,849.96 and 371,418

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Solution

The fourth proportional to 639,690, 882,849.96 and 371,418 is: 512,601.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,690 : 882,849.96 = 371,418 : x
  2. Step 2: Convert to fraction form
    639,690/882,849.96 = 371,418/x
  3. Step 3: Cross multiply
    639,690x = 882,849.96 × 371,418
  4. Step 4: Simplify right side
    639,690x = 327,906,366,443.28
  5. Step 5: Solve for x
    x = 327,906,366,443.28/639,690
  6. Step 6: Final answer
    x = 512,601.99

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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.