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Finding the Fourth Proportional to 867,903.69, 1,300,936.98 and 394,921.20

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Solution

The fourth proportional to 867,903.69, 1,300,936.98 and 394,921.20 is: 591,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,903.69 : 1,300,936.98 = 394,921.20 : x
  2. Step 2: Convert to fraction form
    867,903.69/1,300,936.98 = 394,921.20/x
  3. Step 3: Cross multiply
    867,903.69x = 1,300,936.98 × 394,921.20
  4. Step 4: Simplify right side
    867,903.69x = 513,767,593,265.98
  5. Step 5: Solve for x
    x = 513,767,593,265.98/867,903.69
  6. Step 6: Final answer
    x = 591,963.83

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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.