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Finding the Fourth Proportional to 398,528.20, 597,792.30 and 256,810.60

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Solution

The fourth proportional to 398,528.20, 597,792.30 and 256,810.60 is: 385,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,528.20 : 597,792.30 = 256,810.60 : x
  2. Step 2: Convert to fraction form
    398,528.20/597,792.30 = 256,810.60/x
  3. Step 3: Cross multiply
    398,528.20x = 597,792.30 × 256,810.60
  4. Step 4: Simplify right side
    398,528.20x = 153,519,399,238.38
  5. Step 5: Solve for x
    x = 153,519,399,238.38/398,528.20
  6. Step 6: Final answer
    x = 385,215.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.