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Finding the Fourth Proportional to 519,142.90, 778,860.15 and 252,912.10

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Solution

The fourth proportional to 519,142.90, 778,860.15 and 252,912.10 is: 379,439.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,142.90 : 778,860.15 = 252,912.10 : x
  2. Step 2: Convert to fraction form
    519,142.90/778,860.15 = 252,912.10/x
  3. Step 3: Cross multiply
    519,142.90x = 778,860.15 × 252,912.10
  4. Step 4: Simplify right side
    519,142.90x = 196,983,156,142.82
  5. Step 5: Solve for x
    x = 196,983,156,142.82/519,142.90
  6. Step 6: Final answer
    x = 379,439.18

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1.5x scale

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.