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Finding the Fourth Proportional to 668,777.76, 1,003,319.76 and 289,761.56

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Solution

The fourth proportional to 668,777.76, 1,003,319.76 and 289,761.56 is: 434,708.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,777.76 : 1,003,319.76 = 289,761.56 : x
  2. Step 2: Convert to fraction form
    668,777.76/1,003,319.76 = 289,761.56/x
  3. Step 3: Cross multiply
    668,777.76x = 1,003,319.76 × 289,761.56
  4. Step 4: Simplify right side
    668,777.76x = 290,723,498,836.43
  5. Step 5: Solve for x
    x = 290,723,498,836.43/668,777.76
  6. Step 6: Final answer
    x = 434,708.68

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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.