Home / 579,487.20-869,230.80-259,638.45

Finding the Fourth Proportional to 579,487.20, 869,230.80 and 259,638.45

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Solution

The fourth proportional to 579,487.20, 869,230.80 and 259,638.45 is: 389,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,487.20 : 869,230.80 = 259,638.45 : x
  2. Step 2: Convert to fraction form
    579,487.20/869,230.80 = 259,638.45/x
  3. Step 3: Cross multiply
    579,487.20x = 869,230.80 × 259,638.45
  4. Step 4: Simplify right side
    579,487.20x = 225,685,737,604.26
  5. Step 5: Solve for x
    x = 225,685,737,604.26/579,487.20
  6. Step 6: Final answer
    x = 389,457.68

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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.