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Finding the Fourth Proportional to 419,340.85, 578,675.17 and 256,270.17

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Solution

The fourth proportional to 419,340.85, 578,675.17 and 256,270.17 is: 353,643.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,340.85 : 578,675.17 = 256,270.17 : x
  2. Step 2: Convert to fraction form
    419,340.85/578,675.17 = 256,270.17/x
  3. Step 3: Cross multiply
    419,340.85x = 578,675.17 × 256,270.17
  4. Step 4: Simplify right side
    419,340.85x = 148,297,183,550.00
  5. Step 5: Solve for x
    x = 148,297,183,550.00/419,340.85
  6. Step 6: Final answer
    x = 353,643.54

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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.