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Finding the Fourth Proportional to 285,485.76, 393,954.84 and 158,153.76

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Solution

The fourth proportional to 285,485.76, 393,954.84 and 158,153.76 is: 218,243.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,485.76 : 393,954.84 = 158,153.76 : x
  2. Step 2: Convert to fraction form
    285,485.76/393,954.84 = 158,153.76/x
  3. Step 3: Cross multiply
    285,485.76x = 393,954.84 × 158,153.76
  4. Step 4: Simplify right side
    285,485.76x = 62,305,439,216.20
  5. Step 5: Solve for x
    x = 62,305,439,216.20/285,485.76
  6. Step 6: Final answer
    x = 218,243.60

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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.