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Finding the Fourth Proportional to 558,411.57, 768,662.46 and 486,668.25

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Solution

The fourth proportional to 558,411.57, 768,662.46 and 486,668.25 is: 669,906.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,411.57 : 768,662.46 = 486,668.25 : x
  2. Step 2: Convert to fraction form
    558,411.57/768,662.46 = 486,668.25/x
  3. Step 3: Cross multiply
    558,411.57x = 768,662.46 × 486,668.25
  4. Step 4: Simplify right side
    558,411.57x = 374,083,614,248.90
  5. Step 5: Solve for x
    x = 374,083,614,248.90/558,411.57
  6. Step 6: Final answer
    x = 669,906.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.