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Finding the Fourth Proportional to 520,778.01, 718,667.19 and 305,937.66

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Solution

The fourth proportional to 520,778.01, 718,667.19 and 305,937.66 is: 422,190.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,778.01 : 718,667.19 = 305,937.66 : x
  2. Step 2: Convert to fraction form
    520,778.01/718,667.19 = 305,937.66/x
  3. Step 3: Cross multiply
    520,778.01x = 718,667.19 × 305,937.66
  4. Step 4: Simplify right side
    520,778.01x = 219,867,358,427.38
  5. Step 5: Solve for x
    x = 219,867,358,427.38/520,778.01
  6. Step 6: Final answer
    x = 422,190.17

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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.