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Finding the Fourth Proportional to 613,295.82, 845,989.50 and 398,578.89

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Solution

The fourth proportional to 613,295.82, 845,989.50 and 398,578.89 is: 549,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,295.82 : 845,989.50 = 398,578.89 : x
  2. Step 2: Convert to fraction form
    613,295.82/845,989.50 = 398,578.89/x
  3. Step 3: Cross multiply
    613,295.82x = 845,989.50 × 398,578.89
  4. Step 4: Simplify right side
    613,295.82x = 337,193,555,861.66
  5. Step 5: Solve for x
    x = 337,193,555,861.66/613,295.82
  6. Step 6: Final answer
    x = 549,805.73

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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.