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Finding the Fourth Proportional to 668,145.60, 1,002,218.40 and 620,906.40

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Solution

The fourth proportional to 668,145.60, 1,002,218.40 and 620,906.40 is: 931,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,145.60 : 1,002,218.40 = 620,906.40 : x
  2. Step 2: Convert to fraction form
    668,145.60/1,002,218.40 = 620,906.40/x
  3. Step 3: Cross multiply
    668,145.60x = 1,002,218.40 × 620,906.40
  4. Step 4: Simplify right side
    668,145.60x = 622,283,818,757.76
  5. Step 5: Solve for x
    x = 622,283,818,757.76/668,145.60
  6. Step 6: Final answer
    x = 931,359.60

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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.