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Finding the Fourth Proportional to 287,697.97, 397,193.30 and 255,778.53

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Solution

The fourth proportional to 287,697.97, 397,193.30 and 255,778.53 is: 353,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,697.97 : 397,193.30 = 255,778.53 : x
  2. Step 2: Convert to fraction form
    287,697.97/397,193.30 = 255,778.53/x
  3. Step 3: Cross multiply
    287,697.97x = 397,193.30 × 255,778.53
  4. Step 4: Simplify right side
    287,697.97x = 101,593,518,399.85
  5. Step 5: Solve for x
    x = 101,593,518,399.85/287,697.97
  6. Step 6: Final answer
    x = 353,125.60

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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.