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Finding the Fourth Proportional to 519,268.60, 778,845.30 and 145,329.40

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Solution

The fourth proportional to 519,268.60, 778,845.30 and 145,329.40 is: 217,977.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,268.60 : 778,845.30 = 145,329.40 : x
  2. Step 2: Convert to fraction form
    519,268.60/778,845.30 = 145,329.40/x
  3. Step 3: Cross multiply
    519,268.60x = 778,845.30 × 145,329.40
  4. Step 4: Simplify right side
    519,268.60x = 113,189,120,141.82
  5. Step 5: Solve for x
    x = 113,189,120,141.82/519,268.60
  6. Step 6: Final answer
    x = 217,977.98

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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.