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Finding the Fourth Proportional to 654,145.80, 981,251.10 and 339,217.80

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Solution

The fourth proportional to 654,145.80, 981,251.10 and 339,217.80 is: 508,843.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,145.80 : 981,251.10 = 339,217.80 : x
  2. Step 2: Convert to fraction form
    654,145.80/981,251.10 = 339,217.80/x
  3. Step 3: Cross multiply
    654,145.80x = 981,251.10 × 339,217.80
  4. Step 4: Simplify right side
    654,145.80x = 332,857,839,389.58
  5. Step 5: Solve for x
    x = 332,857,839,389.58/654,145.80
  6. Step 6: Final answer
    x = 508,843.50

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Double scale
Find fourth proportional to 654,146.80, 981,252.60 and 339,218.80
Similar ratio
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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.