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Finding the Fourth Proportional to 625,638.92, 863,716.70 and 489,383.34

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Solution

The fourth proportional to 625,638.92, 863,716.70 and 489,383.34 is: 675,611.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,638.92 : 863,716.70 = 489,383.34 : x
  2. Step 2: Convert to fraction form
    625,638.92/863,716.70 = 489,383.34/x
  3. Step 3: Cross multiply
    625,638.92x = 863,716.70 × 489,383.34
  4. Step 4: Simplify right side
    625,638.92x = 422,688,563,459.78
  5. Step 5: Solve for x
    x = 422,688,563,459.78/625,638.92
  6. Step 6: Final answer
    x = 675,611.04

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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.