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Finding the Fourth Proportional to 394,947.31, 545,025.63 and 213,658.81

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Solution

The fourth proportional to 394,947.31, 545,025.63 and 213,658.81 is: 294,848.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,947.31 : 545,025.63 = 213,658.81 : x
  2. Step 2: Convert to fraction form
    394,947.31/545,025.63 = 213,658.81/x
  3. Step 3: Cross multiply
    394,947.31x = 545,025.63 × 213,658.81
  4. Step 4: Simplify right side
    394,947.31x = 116,449,527,525.30
  5. Step 5: Solve for x
    x = 116,449,527,525.30/394,947.31
  6. Step 6: Final answer
    x = 294,848.26

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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.