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Finding the Fourth Proportional to 613,821.03, 847,115.61 and 372,113.79

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Solution

The fourth proportional to 613,821.03, 847,115.61 and 372,113.79 is: 513,542.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,821.03 : 847,115.61 = 372,113.79 : x
  2. Step 2: Convert to fraction form
    613,821.03/847,115.61 = 372,113.79/x
  3. Step 3: Cross multiply
    613,821.03x = 847,115.61 × 372,113.79
  4. Step 4: Simplify right side
    613,821.03x = 315,223,401,600.69
  5. Step 5: Solve for x
    x = 315,223,401,600.69/613,821.03
  6. Step 6: Final answer
    x = 513,542.85

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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.