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Finding the Fourth Proportional to 340,474.20, 510,711.30 and 172,512.60

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Solution

The fourth proportional to 340,474.20, 510,711.30 and 172,512.60 is: 258,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,474.20 : 510,711.30 = 172,512.60 : x
  2. Step 2: Convert to fraction form
    340,474.20/510,711.30 = 172,512.60/x
  3. Step 3: Cross multiply
    340,474.20x = 510,711.30 × 172,512.60
  4. Step 4: Simplify right side
    340,474.20x = 88,104,134,212.38
  5. Step 5: Solve for x
    x = 88,104,134,212.38/340,474.20
  6. Step 6: Final answer
    x = 258,768.90

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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.