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Finding the Fourth Proportional to 489,679.60, 733,943.40 and 279,516.40

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Solution

The fourth proportional to 489,679.60, 733,943.40 and 279,516.40 is: 418,945.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,679.60 : 733,943.40 = 279,516.40 : x
  2. Step 2: Convert to fraction form
    489,679.60/733,943.40 = 279,516.40/x
  3. Step 3: Cross multiply
    489,679.60x = 733,943.40 × 279,516.40
  4. Step 4: Simplify right side
    489,679.60x = 205,149,216,971.76
  5. Step 5: Solve for x
    x = 205,149,216,971.76/489,679.60
  6. Step 6: Final answer
    x = 418,945.81

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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.