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Finding the Fourth Proportional to 519,772.80, 779,659.20 and 145,859.20

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Solution

The fourth proportional to 519,772.80, 779,659.20 and 145,859.20 is: 218,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,772.80 : 779,659.20 = 145,859.20 : x
  2. Step 2: Convert to fraction form
    519,772.80/779,659.20 = 145,859.20/x
  3. Step 3: Cross multiply
    519,772.80x = 779,659.20 × 145,859.20
  4. Step 4: Simplify right side
    519,772.80x = 113,720,467,184.64
  5. Step 5: Solve for x
    x = 113,720,467,184.64/519,772.80
  6. Step 6: Final answer
    x = 218,788.80

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Similar ratio
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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.