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Finding the Fourth Proportional to 665,782.92, 917,700.81 and 520,331.82

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Solution

The fourth proportional to 665,782.92, 917,700.81 and 520,331.82 is: 717,214.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,782.92 : 917,700.81 = 520,331.82 : x
  2. Step 2: Convert to fraction form
    665,782.92/917,700.81 = 520,331.82/x
  3. Step 3: Cross multiply
    665,782.92x = 917,700.81 × 520,331.82
  4. Step 4: Simplify right side
    665,782.92x = 477,508,932,682.77
  5. Step 5: Solve for x
    x = 477,508,932,682.77/665,782.92
  6. Step 6: Final answer
    x = 717,214.15

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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.