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Finding the Fourth Proportional to 400,129.39, 600,617 and 391,093.84

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Solution

The fourth proportional to 400,129.39, 600,617 and 391,093.84 is: 587,054.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,129.39 : 600,617 = 391,093.84 : x
  2. Step 2: Convert to fraction form
    400,129.39/600,617 = 391,093.84/x
  3. Step 3: Cross multiply
    400,129.39x = 600,617 × 391,093.84
  4. Step 4: Simplify right side
    400,129.39x = 234,897,608,899.28
  5. Step 5: Solve for x
    x = 234,897,608,899.28/400,129.39
  6. Step 6: Final answer
    x = 587,054.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.