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Finding the Fourth Proportional to 660,581.82, 990,756.09 and 261,089.82

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Solution

The fourth proportional to 660,581.82, 990,756.09 and 261,089.82 is: 391,588.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,581.82 : 990,756.09 = 261,089.82 : x
  2. Step 2: Convert to fraction form
    660,581.82/990,756.09 = 261,089.82/x
  3. Step 3: Cross multiply
    660,581.82x = 990,756.09 × 261,089.82
  4. Step 4: Simplify right side
    660,581.82x = 258,676,329,202.00
  5. Step 5: Solve for x
    x = 258,676,329,202.00/660,581.82
  6. Step 6: Final answer
    x = 391,588.63

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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.