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Finding the Fourth Proportional to 279,141.28, 385,203.90 and 151,816.84

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Solution

The fourth proportional to 279,141.28, 385,203.90 and 151,816.84 is: 209,501.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,141.28 : 385,203.90 = 151,816.84 : x
  2. Step 2: Convert to fraction form
    279,141.28/385,203.90 = 151,816.84/x
  3. Step 3: Cross multiply
    279,141.28x = 385,203.90 × 151,816.84
  4. Step 4: Simplify right side
    279,141.28x = 58,480,438,853.68
  5. Step 5: Solve for x
    x = 58,480,438,853.68/279,141.28
  6. Step 6: Final answer
    x = 209,501.22

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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.