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Finding the Fourth Proportional to 520,908.80, 783,112.80 and 443,926.40

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Solution

The fourth proportional to 520,908.80, 783,112.80 and 443,926.40 is: 667,380.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,908.80 : 783,112.80 = 443,926.40 : x
  2. Step 2: Convert to fraction form
    520,908.80/783,112.80 = 443,926.40/x
  3. Step 3: Cross multiply
    520,908.80x = 783,112.80 × 443,926.40
  4. Step 4: Simplify right side
    520,908.80x = 347,644,446,097.92
  5. Step 5: Solve for x
    x = 347,644,446,097.92/520,908.80
  6. Step 6: Final answer
    x = 667,380.64

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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.