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Finding the Fourth Proportional to 638,155.40, 958,010.70 and 633,489.80

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Solution

The fourth proportional to 638,155.40, 958,010.70 and 633,489.80 is: 951,006.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,155.40 : 958,010.70 = 633,489.80 : x
  2. Step 2: Convert to fraction form
    638,155.40/958,010.70 = 633,489.80/x
  3. Step 3: Cross multiply
    638,155.40x = 958,010.70 × 633,489.80
  4. Step 4: Simplify right side
    638,155.40x = 606,890,006,740.86
  5. Step 5: Solve for x
    x = 606,890,006,740.86/638,155.40
  6. Step 6: Final answer
    x = 951,006.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.