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Finding the Fourth Proportional to 256,505.32, 353,976.60 and 143,328.16

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Solution

The fourth proportional to 256,505.32, 353,976.60 and 143,328.16 is: 197,792.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,505.32 : 353,976.60 = 143,328.16 : x
  2. Step 2: Convert to fraction form
    256,505.32/353,976.60 = 143,328.16/x
  3. Step 3: Cross multiply
    256,505.32x = 353,976.60 × 143,328.16
  4. Step 4: Simplify right side
    256,505.32x = 50,734,814,761.06
  5. Step 5: Solve for x
    x = 50,734,814,761.06/256,505.32
  6. Step 6: Final answer
    x = 197,792.45

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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.