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Finding the Fourth Proportional to 587,586.50, 811,117.44 and 396,858.20

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Solution

The fourth proportional to 587,586.50, 811,117.44 and 396,858.20 is: 547,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,586.50 : 811,117.44 = 396,858.20 : x
  2. Step 2: Convert to fraction form
    587,586.50/811,117.44 = 396,858.20/x
  3. Step 3: Cross multiply
    587,586.50x = 811,117.44 × 396,858.20
  4. Step 4: Simplify right side
    587,586.50x = 321,898,607,227.01
  5. Step 5: Solve for x
    x = 321,898,607,227.01/587,586.50
  6. Step 6: Final answer
    x = 547,831.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.