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Finding the Fourth Proportional to 613,296.82, 845,990.88 and 398,579.89

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Solution

The fourth proportional to 613,296.82, 845,990.88 and 398,579.89 is: 549,807.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,296.82 : 845,990.88 = 398,579.89 : x
  2. Step 2: Convert to fraction form
    613,296.82/845,990.88 = 398,579.89/x
  3. Step 3: Cross multiply
    613,296.82x = 845,990.88 × 398,579.89
  4. Step 4: Simplify right side
    613,296.82x = 337,194,951,891.40
  5. Step 5: Solve for x
    x = 337,194,951,891.40/613,296.82
  6. Step 6: Final answer
    x = 549,807.11

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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.