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Finding the Fourth Proportional to 603,602.70, 905,404.05 and 391,026.30

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Solution

The fourth proportional to 603,602.70, 905,404.05 and 391,026.30 is: 586,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,602.70 : 905,404.05 = 391,026.30 : x
  2. Step 2: Convert to fraction form
    603,602.70/905,404.05 = 391,026.30/x
  3. Step 3: Cross multiply
    603,602.70x = 905,404.05 × 391,026.30
  4. Step 4: Simplify right side
    603,602.70x = 354,036,795,676.52
  5. Step 5: Solve for x
    x = 354,036,795,676.52/603,602.70
  6. Step 6: Final answer
    x = 586,539.45

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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.