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Finding the Fourth Proportional to 650,999.75, 898,234.35 and 392,918.57

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Solution

The fourth proportional to 650,999.75, 898,234.35 and 392,918.57 is: 542,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    650,999.75 : 898,234.35 = 392,918.57 : x
  2. Step 2: Convert to fraction form
    650,999.75/898,234.35 = 392,918.57/x
  3. Step 3: Cross multiply
    650,999.75x = 898,234.35 × 392,918.57
  4. Step 4: Simplify right side
    650,999.75x = 352,932,951,835.71
  5. Step 5: Solve for x
    x = 352,932,951,835.71/650,999.75
  6. Step 6: Final answer
    x = 542,139.92

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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.