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Finding the Fourth Proportional to 521,168.60, 719,230.26 and 306,305.60

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Solution

The fourth proportional to 521,168.60, 719,230.26 and 306,305.60 is: 422,712.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,168.60 : 719,230.26 = 306,305.60 : x
  2. Step 2: Convert to fraction form
    521,168.60/719,230.26 = 306,305.60/x
  3. Step 3: Cross multiply
    521,168.60x = 719,230.26 × 306,305.60
  4. Step 4: Simplify right side
    521,168.60x = 220,304,256,327.46
  5. Step 5: Solve for x
    x = 220,304,256,327.46/521,168.60
  6. Step 6: Final answer
    x = 422,712.07

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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.