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Finding the Fourth Proportional to 348,059.20, 521,311.20 and 285,851.20

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Solution

The fourth proportional to 348,059.20, 521,311.20 and 285,851.20 is: 428,138.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,059.20 : 521,311.20 = 285,851.20 : x
  2. Step 2: Convert to fraction form
    348,059.20/521,311.20 = 285,851.20/x
  3. Step 3: Cross multiply
    348,059.20x = 521,311.20 × 285,851.20
  4. Step 4: Simplify right side
    348,059.20x = 149,017,432,093.44
  5. Step 5: Solve for x
    x = 149,017,432,093.44/348,059.20
  6. Step 6: Final answer
    x = 428,138.18

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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.