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Finding the Fourth Proportional to 386,858.81, 533,903.51 and 217,093.61

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Solution

The fourth proportional to 386,858.81, 533,903.51 and 217,093.61 is: 299,610.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,858.81 : 533,903.51 = 217,093.61 : x
  2. Step 2: Convert to fraction form
    386,858.81/533,903.51 = 217,093.61/x
  3. Step 3: Cross multiply
    386,858.81x = 533,903.51 × 217,093.61
  4. Step 4: Simplify right side
    386,858.81x = 115,907,038,250.79
  5. Step 5: Solve for x
    x = 115,907,038,250.79/386,858.81
  6. Step 6: Final answer
    x = 299,610.70

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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.