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Finding the Fourth Proportional to 518,523.20, 776,229.60 and 308,052.80

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Solution

The fourth proportional to 518,523.20, 776,229.60 and 308,052.80 is: 461,155.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,523.20 : 776,229.60 = 308,052.80 : x
  2. Step 2: Convert to fraction form
    518,523.20/776,229.60 = 308,052.80/x
  3. Step 3: Cross multiply
    518,523.20x = 776,229.60 × 308,052.80
  4. Step 4: Simplify right side
    518,523.20x = 239,119,701,722.88
  5. Step 5: Solve for x
    x = 239,119,701,722.88/518,523.20
  6. Step 6: Final answer
    x = 461,155.26

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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.