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Finding the Fourth Proportional to 605,039.60, 907,645.80 and 205,698.80

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Solution

The fourth proportional to 605,039.60, 907,645.80 and 205,698.80 is: 308,577.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,039.60 : 907,645.80 = 205,698.80 : x
  2. Step 2: Convert to fraction form
    605,039.60/907,645.80 = 205,698.80/x
  3. Step 3: Cross multiply
    605,039.60x = 907,645.80 × 205,698.80
  4. Step 4: Simplify right side
    605,039.60x = 186,701,651,885.04
  5. Step 5: Solve for x
    x = 186,701,651,885.04/605,039.60
  6. Step 6: Final answer
    x = 308,577.57

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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.