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Finding the Fourth Proportional to 868,630.60, 1,303,820.70 and 419,712.40

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Solution

The fourth proportional to 868,630.60, 1,303,820.70 and 419,712.40 is: 629,991.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,630.60 : 1,303,820.70 = 419,712.40 : x
  2. Step 2: Convert to fraction form
    868,630.60/1,303,820.70 = 419,712.40/x
  3. Step 3: Cross multiply
    868,630.60x = 1,303,820.70 × 419,712.40
  4. Step 4: Simplify right side
    868,630.60x = 547,229,715,166.68
  5. Step 5: Solve for x
    x = 547,229,715,166.68/868,630.60
  6. Step 6: Final answer
    x = 629,991.29

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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.