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Finding the Fourth Proportional to 659,218.70, 987,515.85 and 343,853.30

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Solution

The fourth proportional to 659,218.70, 987,515.85 and 343,853.30 is: 515,095.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,218.70 : 987,515.85 = 343,853.30 : x
  2. Step 2: Convert to fraction form
    659,218.70/987,515.85 = 343,853.30/x
  3. Step 3: Cross multiply
    659,218.70x = 987,515.85 × 343,853.30
  4. Step 4: Simplify right side
    659,218.70x = 339,560,583,824.81
  5. Step 5: Solve for x
    x = 339,560,583,824.81/659,218.70
  6. Step 6: Final answer
    x = 515,095.50

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Double scale
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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.