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Finding the Fourth Proportional to 609,512.40, 912,713.40 and 485,096.40

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Solution

The fourth proportional to 609,512.40, 912,713.40 and 485,096.40 is: 726,406.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,512.40 : 912,713.40 = 485,096.40 : x
  2. Step 2: Convert to fraction form
    609,512.40/912,713.40 = 485,096.40/x
  3. Step 3: Cross multiply
    609,512.40x = 912,713.40 × 485,096.40
  4. Step 4: Simplify right side
    609,512.40x = 442,753,984,571.76
  5. Step 5: Solve for x
    x = 442,753,984,571.76/609,512.40
  6. Step 6: Final answer
    x = 726,406.85

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1.5x scale

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.