Home / 645,503.80-890,183.76-413,004.24

Finding the Fourth Proportional to 645,503.80, 890,183.76 and 413,004.24

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Solution

The fourth proportional to 645,503.80, 890,183.76 and 413,004.24 is: 569,554.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,503.80 : 890,183.76 = 413,004.24 : x
  2. Step 2: Convert to fraction form
    645,503.80/890,183.76 = 413,004.24/x
  3. Step 3: Cross multiply
    645,503.80x = 890,183.76 × 413,004.24
  4. Step 4: Simplify right side
    645,503.80x = 367,649,667,259.14
  5. Step 5: Solve for x
    x = 367,649,667,259.14/645,503.80
  6. Step 6: Final answer
    x = 569,554.61

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.