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Finding the Fourth Proportional to 660,640.44, 990,610.74 and 261,265.08

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Solution

The fourth proportional to 660,640.44, 990,610.74 and 261,265.08 is: 391,759.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,640.44 : 990,610.74 = 261,265.08 : x
  2. Step 2: Convert to fraction form
    660,640.44/990,610.74 = 261,265.08/x
  3. Step 3: Cross multiply
    660,640.44x = 990,610.74 × 261,265.08
  4. Step 4: Simplify right side
    660,640.44x = 258,811,994,234.96
  5. Step 5: Solve for x
    x = 258,811,994,234.96/660,640.44
  6. Step 6: Final answer
    x = 391,759.24

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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.