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Finding the Fourth Proportional to 626,638.70, 939,958.05 and 558,404.30

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Solution

The fourth proportional to 626,638.70, 939,958.05 and 558,404.30 is: 837,606.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,638.70 : 939,958.05 = 558,404.30 : x
  2. Step 2: Convert to fraction form
    626,638.70/939,958.05 = 558,404.30/x
  3. Step 3: Cross multiply
    626,638.70x = 939,958.05 × 558,404.30
  4. Step 4: Simplify right side
    626,638.70x = 524,876,616,939.62
  5. Step 5: Solve for x
    x = 524,876,616,939.62/626,638.70
  6. Step 6: Final answer
    x = 837,606.45

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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.