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Finding the Fourth Proportional to 386,641.56, 533,529.50 and 216,842.84

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Solution

The fourth proportional to 386,641.56, 533,529.50 and 216,842.84 is: 299,223.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,641.56 : 533,529.50 = 216,842.84 : x
  2. Step 2: Convert to fraction form
    386,641.56/533,529.50 = 216,842.84/x
  3. Step 3: Cross multiply
    386,641.56x = 533,529.50 × 216,842.84
  4. Step 4: Simplify right side
    386,641.56x = 115,692,052,003.78
  5. Step 5: Solve for x
    x = 115,692,052,003.78/386,641.56
  6. Step 6: Final answer
    x = 299,223.01

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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.