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Finding the Fourth Proportional to 520,899.20, 779,793.60 and 310,428.80

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Solution

The fourth proportional to 520,899.20, 779,793.60 and 310,428.80 is: 464,716.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,899.20 : 779,793.60 = 310,428.80 : x
  2. Step 2: Convert to fraction form
    520,899.20/779,793.60 = 310,428.80/x
  3. Step 3: Cross multiply
    520,899.20x = 779,793.60 × 310,428.80
  4. Step 4: Simplify right side
    520,899.20x = 242,070,391,495.68
  5. Step 5: Solve for x
    x = 242,070,391,495.68/520,899.20
  6. Step 6: Final answer
    x = 464,716.38

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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.