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Finding the Fourth Proportional to 520,199.70, 779,716.35 and 220,629.30

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Solution

The fourth proportional to 520,199.70, 779,716.35 and 220,629.30 is: 330,696.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,199.70 : 779,716.35 = 220,629.30 : x
  2. Step 2: Convert to fraction form
    520,199.70/779,716.35 = 220,629.30/x
  3. Step 3: Cross multiply
    520,199.70x = 779,716.35 × 220,629.30
  4. Step 4: Simplify right side
    520,199.70x = 172,028,272,499.06
  5. Step 5: Solve for x
    x = 172,028,272,499.06/520,199.70
  6. Step 6: Final answer
    x = 330,696.60

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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.