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Finding the Fourth Proportional to 659,209.20, 987,501.60 and 343,843.80

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Solution

The fourth proportional to 659,209.20, 987,501.60 and 343,843.80 is: 515,081.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,209.20 : 987,501.60 = 343,843.80 : x
  2. Step 2: Convert to fraction form
    659,209.20/987,501.60 = 343,843.80/x
  3. Step 3: Cross multiply
    659,209.20x = 987,501.60 × 343,843.80
  4. Step 4: Simplify right side
    659,209.20x = 339,546,302,650.08
  5. Step 5: Solve for x
    x = 339,546,302,650.08/659,209.20
  6. Step 6: Final answer
    x = 515,081.26

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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.