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Finding the Fourth Proportional to 613,240.90, 845,792.18 and 398,450.77

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Solution

The fourth proportional to 613,240.90, 845,792.18 and 398,450.77 is: 549,550.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,240.90 : 845,792.18 = 398,450.77 : x
  2. Step 2: Convert to fraction form
    613,240.90/845,792.18 = 398,450.77/x
  3. Step 3: Cross multiply
    613,240.90x = 845,792.18 × 398,450.77
  4. Step 4: Simplify right side
    613,240.90x = 337,006,543,388.73
  5. Step 5: Solve for x
    x = 337,006,543,388.73/613,240.90
  6. Step 6: Final answer
    x = 549,550.01

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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.