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Finding the Fourth Proportional to 492,637.92, 679,847.89 and 288,640.02

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Solution

The fourth proportional to 492,637.92, 679,847.89 and 288,640.02 is: 398,327.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,637.92 : 679,847.89 = 288,640.02 : x
  2. Step 2: Convert to fraction form
    492,637.92/679,847.89 = 288,640.02/x
  3. Step 3: Cross multiply
    492,637.92x = 679,847.89 × 288,640.02
  4. Step 4: Simplify right side
    492,637.92x = 196,231,305,167.32
  5. Step 5: Solve for x
    x = 196,231,305,167.32/492,637.92
  6. Step 6: Final answer
    x = 398,327.65

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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.