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Finding the Fourth Proportional to 654,064.80, 981,097.20 and 339,136.80

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Solution

The fourth proportional to 654,064.80, 981,097.20 and 339,136.80 is: 508,705.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,064.80 : 981,097.20 = 339,136.80 : x
  2. Step 2: Convert to fraction form
    654,064.80/981,097.20 = 339,136.80/x
  3. Step 3: Cross multiply
    654,064.80x = 981,097.20 × 339,136.80
  4. Step 4: Simplify right side
    654,064.80x = 332,726,164,896.96
  5. Step 5: Solve for x
    x = 332,726,164,896.96/654,064.80
  6. Step 6: Final answer
    x = 508,705.20

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Half scale
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Double scale
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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.