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Finding the Fourth Proportional to 386,618.36, 579,788.49 and 133,830.32

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Solution

The fourth proportional to 386,618.36, 579,788.49 and 133,830.32 is: 200,697.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,618.36 : 579,788.49 = 133,830.32 : x
  2. Step 2: Convert to fraction form
    386,618.36/579,788.49 = 133,830.32/x
  3. Step 3: Cross multiply
    386,618.36x = 579,788.49 × 133,830.32
  4. Step 4: Simplify right side
    386,618.36x = 77,593,279,149.02
  5. Step 5: Solve for x
    x = 77,593,279,149.02/386,618.36
  6. Step 6: Final answer
    x = 200,697.35

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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.