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Finding the Fourth Proportional to 661,668.06, 991,919.68 and 262,589.16

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Solution

The fourth proportional to 661,668.06, 991,919.68 and 262,589.16 is: 393,652.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,668.06 : 991,919.68 = 262,589.16 : x
  2. Step 2: Convert to fraction form
    661,668.06/991,919.68 = 262,589.16/x
  3. Step 3: Cross multiply
    661,668.06x = 991,919.68 × 262,589.16
  4. Step 4: Simplify right side
    661,668.06x = 260,467,355,558.67
  5. Step 5: Solve for x
    x = 260,467,355,558.67/661,668.06
  6. Step 6: Final answer
    x = 393,652.61

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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.