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Finding the Fourth Proportional to 649,487.20, 896,568.72 and 394,920.16

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Solution

The fourth proportional to 649,487.20, 896,568.72 and 394,920.16 is: 545,157.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,487.20 : 896,568.72 = 394,920.16 : x
  2. Step 2: Convert to fraction form
    649,487.20/896,568.72 = 394,920.16/x
  3. Step 3: Cross multiply
    649,487.20x = 896,568.72 × 394,920.16
  4. Step 4: Simplify right side
    649,487.20x = 354,073,062,353.40
  5. Step 5: Solve for x
    x = 354,073,062,353.40/649,487.20
  6. Step 6: Final answer
    x = 545,157.88

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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.