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Finding the Fourth Proportional to 613,820.88, 847,115.34 and 372,113.64

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Solution

The fourth proportional to 613,820.88, 847,115.34 and 372,113.64 is: 513,542.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,820.88 : 847,115.34 = 372,113.64 : x
  2. Step 2: Convert to fraction form
    613,820.88/847,115.34 = 372,113.64/x
  3. Step 3: Cross multiply
    613,820.88x = 847,115.34 × 372,113.64
  4. Step 4: Simplify right side
    613,820.88x = 315,223,172,667.24
  5. Step 5: Solve for x
    x = 315,223,172,667.24/613,820.88
  6. Step 6: Final answer
    x = 513,542.60

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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.