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Finding the Fourth Proportional to 347,135.87, 478,910.54 and 217,998.38

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Solution

The fourth proportional to 347,135.87, 478,910.54 and 217,998.38 is: 300,751.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,135.87 : 478,910.54 = 217,998.38 : x
  2. Step 2: Convert to fraction form
    347,135.87/478,910.54 = 217,998.38/x
  3. Step 3: Cross multiply
    347,135.87x = 478,910.54 × 217,998.38
  4. Step 4: Simplify right side
    347,135.87x = 104,401,718,400.38
  5. Step 5: Solve for x
    x = 104,401,718,400.38/347,135.87
  6. Step 6: Final answer
    x = 300,751.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.