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Finding the Fourth Proportional to 659,212.20, 987,506.10 and 343,846.80

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Solution

The fourth proportional to 659,212.20, 987,506.10 and 343,846.80 is: 515,085.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,212.20 : 987,506.10 = 343,846.80 : x
  2. Step 2: Convert to fraction form
    659,212.20/987,506.10 = 343,846.80/x
  3. Step 3: Cross multiply
    659,212.20x = 987,506.10 × 343,846.80
  4. Step 4: Simplify right side
    659,212.20x = 339,550,812,465.48
  5. Step 5: Solve for x
    x = 339,550,812,465.48/659,212.20
  6. Step 6: Final answer
    x = 515,085.75

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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.