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Finding the Fourth Proportional to 639,654, 882,800.28 and 371,382

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Solution

The fourth proportional to 639,654, 882,800.28 and 371,382 is: 512,552.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,654 : 882,800.28 = 371,382 : x
  2. Step 2: Convert to fraction form
    639,654/882,800.28 = 371,382/x
  3. Step 3: Cross multiply
    639,654x = 882,800.28 × 371,382
  4. Step 4: Simplify right side
    639,654x = 327,856,133,586.96
  5. Step 5: Solve for x
    x = 327,856,133,586.96/639,654
  6. Step 6: Final answer
    x = 512,552.31

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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.