Home / 782,138.42-1,078,793.42-717,814.98

Finding the Fourth Proportional to 782,138.42, 1,078,793.42 and 717,814.98

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Solution

The fourth proportional to 782,138.42, 1,078,793.42 and 717,814.98 is: 990,072.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,138.42 : 1,078,793.42 = 717,814.98 : x
  2. Step 2: Convert to fraction form
    782,138.42/1,078,793.42 = 717,814.98/x
  3. Step 3: Cross multiply
    782,138.42x = 1,078,793.42 × 717,814.98
  4. Step 4: Simplify right side
    782,138.42x = 774,374,077,201.43
  5. Step 5: Solve for x
    x = 774,374,077,201.43/782,138.42
  6. Step 6: Final answer
    x = 990,072.93

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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.