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Finding the Fourth Proportional to 408,187.61, 612,270.14 and 108,670.79

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Solution

The fourth proportional to 408,187.61, 612,270.14 and 108,670.79 is: 163,003.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,187.61 : 612,270.14 = 108,670.79 : x
  2. Step 2: Convert to fraction form
    408,187.61/612,270.14 = 108,670.79/x
  3. Step 3: Cross multiply
    408,187.61x = 612,270.14 × 108,670.79
  4. Step 4: Simplify right side
    408,187.61x = 66,535,876,202.51
  5. Step 5: Solve for x
    x = 66,535,876,202.51/408,187.61
  6. Step 6: Final answer
    x = 163,003.18

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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.