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Finding the Fourth Proportional to 809,781.60, 1,214,672.40 and 620,824.80

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Solution

The fourth proportional to 809,781.60, 1,214,672.40 and 620,824.80 is: 931,237.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,781.60 : 1,214,672.40 = 620,824.80 : x
  2. Step 2: Convert to fraction form
    809,781.60/1,214,672.40 = 620,824.80/x
  3. Step 3: Cross multiply
    809,781.60x = 1,214,672.40 × 620,824.80
  4. Step 4: Simplify right side
    809,781.60x = 754,098,749,795.52
  5. Step 5: Solve for x
    x = 754,098,749,795.52/809,781.60
  6. Step 6: Final answer
    x = 931,237.20

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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.