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Finding the Fourth Proportional to 486,131.60, 728,938.20 and 205,331.60

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Solution

The fourth proportional to 486,131.60, 728,938.20 and 205,331.60 is: 307,887.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,131.60 : 728,938.20 = 205,331.60 : x
  2. Step 2: Convert to fraction form
    486,131.60/728,938.20 = 205,331.60/x
  3. Step 3: Cross multiply
    486,131.60x = 728,938.20 × 205,331.60
  4. Step 4: Simplify right side
    486,131.60x = 149,674,046,907.12
  5. Step 5: Solve for x
    x = 149,674,046,907.12/486,131.60
  6. Step 6: Final answer
    x = 307,887.92

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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.