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Finding the Fourth Proportional to 522,092.90, 783,139.35 and 439,424.30

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Solution

The fourth proportional to 522,092.90, 783,139.35 and 439,424.30 is: 659,136.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,092.90 : 783,139.35 = 439,424.30 : x
  2. Step 2: Convert to fraction form
    522,092.90/783,139.35 = 439,424.30/x
  3. Step 3: Cross multiply
    522,092.90x = 783,139.35 × 439,424.30
  4. Step 4: Simplify right side
    522,092.90x = 344,130,460,676.21
  5. Step 5: Solve for x
    x = 344,130,460,676.21/522,092.90
  6. Step 6: Final answer
    x = 659,136.45

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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.