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Finding the Fourth Proportional to 611,992.60, 917,989.62 and 191,270.68

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Solution

The fourth proportional to 611,992.60, 917,989.62 and 191,270.68 is: 286,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,992.60 : 917,989.62 = 191,270.68 : x
  2. Step 2: Convert to fraction form
    611,992.60/917,989.62 = 191,270.68/x
  3. Step 3: Cross multiply
    611,992.60x = 917,989.62 × 191,270.68
  4. Step 4: Simplify right side
    611,992.60x = 175,584,498,850.34
  5. Step 5: Solve for x
    x = 175,584,498,850.34/611,992.60
  6. Step 6: Final answer
    x = 286,906.25

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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.