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Finding the Fourth Proportional to 613,919.70, 920,879.55 and 187,454.70

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Solution

The fourth proportional to 613,919.70, 920,879.55 and 187,454.70 is: 281,182.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,919.70 : 920,879.55 = 187,454.70 : x
  2. Step 2: Convert to fraction form
    613,919.70/920,879.55 = 187,454.70/x
  3. Step 3: Cross multiply
    613,919.70x = 920,879.55 × 187,454.70
  4. Step 4: Simplify right side
    613,919.70x = 172,623,199,781.39
  5. Step 5: Solve for x
    x = 172,623,199,781.39/613,919.70
  6. Step 6: Final answer
    x = 281,182.05

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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.