Home / 649,519.40-974,279.10-413,906.60

Finding the Fourth Proportional to 649,519.40, 974,279.10 and 413,906.60

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Solution

The fourth proportional to 649,519.40, 974,279.10 and 413,906.60 is: 620,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,519.40 : 974,279.10 = 413,906.60 : x
  2. Step 2: Convert to fraction form
    649,519.40/974,279.10 = 413,906.60/x
  3. Step 3: Cross multiply
    649,519.40x = 974,279.10 × 413,906.60
  4. Step 4: Simplify right side
    649,519.40x = 403,260,549,732.06
  5. Step 5: Solve for x
    x = 403,260,549,732.06/649,519.40
  6. Step 6: Final answer
    x = 620,859.90

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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.