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Finding the Fourth Proportional to 605,062.60, 907,680.30 and 205,721.80

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Solution

The fourth proportional to 605,062.60, 907,680.30 and 205,721.80 is: 308,612.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,062.60 : 907,680.30 = 205,721.80 : x
  2. Step 2: Convert to fraction form
    605,062.60/907,680.30 = 205,721.80/x
  3. Step 3: Cross multiply
    605,062.60x = 907,680.30 × 205,721.80
  4. Step 4: Simplify right side
    605,062.60x = 186,729,625,140.54
  5. Step 5: Solve for x
    x = 186,729,625,140.54/605,062.60
  6. Step 6: Final answer
    x = 308,612.08

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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.