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Finding the Fourth Proportional to 613,296.32, 845,990.19 and 398,579.39

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Solution

The fourth proportional to 613,296.32, 845,990.19 and 398,579.39 is: 549,806.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,296.32 : 845,990.19 = 398,579.39 : x
  2. Step 2: Convert to fraction form
    613,296.32/845,990.19 = 398,579.39/x
  3. Step 3: Cross multiply
    613,296.32x = 845,990.19 × 398,579.39
  4. Step 4: Simplify right side
    613,296.32x = 337,194,253,876.18
  5. Step 5: Solve for x
    x = 337,194,253,876.18/613,296.32
  6. Step 6: Final answer
    x = 549,806.42

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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.