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Finding the Fourth Proportional to 653,987.80, 981,014.10 and 339,059.80

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Solution

The fourth proportional to 653,987.80, 981,014.10 and 339,059.80 is: 508,606.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,987.80 : 981,014.10 = 339,059.80 : x
  2. Step 2: Convert to fraction form
    653,987.80/981,014.10 = 339,059.80/x
  3. Step 3: Cross multiply
    653,987.80x = 981,014.10 × 339,059.80
  4. Step 4: Simplify right side
    653,987.80x = 332,622,444,543.18
  5. Step 5: Solve for x
    x = 332,622,444,543.18/653,987.80
  6. Step 6: Final answer
    x = 508,606.50

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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.