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Finding the Fourth Proportional to 660,583.82, 990,759.09 and 261,091.82

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Solution

The fourth proportional to 660,583.82, 990,759.09 and 261,091.82 is: 391,591.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,583.82 : 990,759.09 = 261,091.82 : x
  2. Step 2: Convert to fraction form
    660,583.82/990,759.09 = 261,091.82/x
  3. Step 3: Cross multiply
    660,583.82x = 990,759.09 × 261,091.82
  4. Step 4: Simplify right side
    660,583.82x = 258,679,093,989.64
  5. Step 5: Solve for x
    x = 258,679,093,989.64/660,583.82
  6. Step 6: Final answer
    x = 391,591.63

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1.5x scale

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.