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Finding the Fourth Proportional to 519,813.60, 779,720.40 and 488,320.80

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Solution

The fourth proportional to 519,813.60, 779,720.40 and 488,320.80 is: 732,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,813.60 : 779,720.40 = 488,320.80 : x
  2. Step 2: Convert to fraction form
    519,813.60/779,720.40 = 488,320.80/x
  3. Step 3: Cross multiply
    519,813.60x = 779,720.40 × 488,320.80
  4. Step 4: Simplify right side
    519,813.60x = 380,753,689,504.32
  5. Step 5: Solve for x
    x = 380,753,689,504.32/519,813.60
  6. Step 6: Final answer
    x = 732,481.20

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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.