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Finding the Fourth Proportional to 519,139.40, 778,854.90 and 252,908.60

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Solution

The fourth proportional to 519,139.40, 778,854.90 and 252,908.60 is: 379,433.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,139.40 : 778,854.90 = 252,908.60 : x
  2. Step 2: Convert to fraction form
    519,139.40/778,854.90 = 252,908.60/x
  3. Step 3: Cross multiply
    519,139.40x = 778,854.90 × 252,908.60
  4. Step 4: Simplify right side
    519,139.40x = 196,979,102,362.14
  5. Step 5: Solve for x
    x = 196,979,102,362.14/519,139.40
  6. Step 6: Final answer
    x = 379,433.93

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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.