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Finding the Fourth Proportional to 325,578.60, 487,979.10 and 136,038.60

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Solution

The fourth proportional to 325,578.60, 487,979.10 and 136,038.60 is: 203,895.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,578.60 : 487,979.10 = 136,038.60 : x
  2. Step 2: Convert to fraction form
    325,578.60/487,979.10 = 136,038.60/x
  3. Step 3: Cross multiply
    325,578.60x = 487,979.10 × 136,038.60
  4. Step 4: Simplify right side
    325,578.60x = 66,383,993,593.26
  5. Step 5: Solve for x
    x = 66,383,993,593.26/325,578.60
  6. Step 6: Final answer
    x = 203,895.45

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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.