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Finding the Fourth Proportional to 691,745.82, 954,821.94 and 405,358.16

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Solution

The fourth proportional to 691,745.82, 954,821.94 and 405,358.16 is: 559,518.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,745.82 : 954,821.94 = 405,358.16 : x
  2. Step 2: Convert to fraction form
    691,745.82/954,821.94 = 405,358.16/x
  3. Step 3: Cross multiply
    691,745.82x = 954,821.94 × 405,358.16
  4. Step 4: Simplify right side
    691,745.82x = 387,044,864,726.03
  5. Step 5: Solve for x
    x = 387,044,864,726.03/691,745.82
  6. Step 6: Final answer
    x = 559,518.91

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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.