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Finding the Fourth Proportional to 627,406.89, 865,751.23 and 355,416.54

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Solution

The fourth proportional to 627,406.89, 865,751.23 and 355,416.54 is: 490,435.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,406.89 : 865,751.23 = 355,416.54 : x
  2. Step 2: Convert to fraction form
    627,406.89/865,751.23 = 355,416.54/x
  3. Step 3: Cross multiply
    627,406.89x = 865,751.23 × 355,416.54
  4. Step 4: Simplify right side
    627,406.89x = 307,702,303,865.05
  5. Step 5: Solve for x
    x = 307,702,303,865.05/627,406.89
  6. Step 6: Final answer
    x = 490,435.01

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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.