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Finding the Fourth Proportional to 862,221.81, 1,189,866.46 and 499,855.71

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Solution

The fourth proportional to 862,221.81, 1,189,866.46 and 499,855.71 is: 689,801.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,221.81 : 1,189,866.46 = 499,855.71 : x
  2. Step 2: Convert to fraction form
    862,221.81/1,189,866.46 = 499,855.71/x
  3. Step 3: Cross multiply
    862,221.81x = 1,189,866.46 × 499,855.71
  4. Step 4: Simplify right side
    862,221.81x = 594,761,541,625.08
  5. Step 5: Solve for x
    x = 594,761,541,625.08/862,221.81
  6. Step 6: Final answer
    x = 689,801.08

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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.