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Finding the Fourth Proportional to 603,721.70, 905,582.55 and 436,416.20

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Solution

The fourth proportional to 603,721.70, 905,582.55 and 436,416.20 is: 654,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,721.70 : 905,582.55 = 436,416.20 : x
  2. Step 2: Convert to fraction form
    603,721.70/905,582.55 = 436,416.20/x
  3. Step 3: Cross multiply
    603,721.70x = 905,582.55 × 436,416.20
  4. Step 4: Simplify right side
    603,721.70x = 395,210,895,257.31
  5. Step 5: Solve for x
    x = 395,210,895,257.31/603,721.70
  6. Step 6: Final answer
    x = 654,624.30

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Half scale
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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.