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Finding the Fourth Proportional to 613,836.88, 847,137.43 and 372,129.64

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Solution

The fourth proportional to 613,836.88, 847,137.43 and 372,129.64 is: 513,564.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,836.88 : 847,137.43 = 372,129.64 : x
  2. Step 2: Convert to fraction form
    613,836.88/847,137.43 = 372,129.64/x
  3. Step 3: Cross multiply
    613,836.88x = 847,137.43 × 372,129.64
  4. Step 4: Simplify right side
    613,836.88x = 315,244,946,856.43
  5. Step 5: Solve for x
    x = 315,244,946,856.43/613,836.88
  6. Step 6: Final answer
    x = 513,564.69

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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.