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Finding the Fourth Proportional to 609,540.40, 912,755.40 and 485,124.40

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Solution

The fourth proportional to 609,540.40, 912,755.40 and 485,124.40 is: 726,448.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,540.40 : 912,755.40 = 485,124.40 : x
  2. Step 2: Convert to fraction form
    609,540.40/912,755.40 = 485,124.40/x
  3. Step 3: Cross multiply
    609,540.40x = 912,755.40 × 485,124.40
  4. Step 4: Simplify right side
    609,540.40x = 442,799,915,771.76
  5. Step 5: Solve for x
    x = 442,799,915,771.76/609,540.40
  6. Step 6: Final answer
    x = 726,448.84

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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.