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Finding the Fourth Proportional to 573,139.20, 857,667.60 and 499,072.80

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Solution

The fourth proportional to 573,139.20, 857,667.60 and 499,072.80 is: 746,831.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,139.20 : 857,667.60 = 499,072.80 : x
  2. Step 2: Convert to fraction form
    573,139.20/857,667.60 = 499,072.80/x
  3. Step 3: Cross multiply
    573,139.20x = 857,667.60 × 499,072.80
  4. Step 4: Simplify right side
    573,139.20x = 428,038,570,601.28
  5. Step 5: Solve for x
    x = 428,038,570,601.28/573,139.20
  6. Step 6: Final answer
    x = 746,831.78

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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.