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Finding the Fourth Proportional to 519,709.20, 779,454.45 and 220,199.55

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Solution

The fourth proportional to 519,709.20, 779,454.45 and 220,199.55 is: 330,252.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,709.20 : 779,454.45 = 220,199.55 : x
  2. Step 2: Convert to fraction form
    519,709.20/779,454.45 = 220,199.55/x
  3. Step 3: Cross multiply
    519,709.20x = 779,454.45 × 220,199.55
  4. Step 4: Simplify right side
    519,709.20x = 171,635,519,135.50
  5. Step 5: Solve for x
    x = 171,635,519,135.50/519,709.20
  6. Step 6: Final answer
    x = 330,252.99

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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.