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Finding the Fourth Proportional to 394,715.80, 591,393.30 and 183,921.40

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Solution

The fourth proportional to 394,715.80, 591,393.30 and 183,921.40 is: 275,565.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,715.80 : 591,393.30 = 183,921.40 : x
  2. Step 2: Convert to fraction form
    394,715.80/591,393.30 = 183,921.40/x
  3. Step 3: Cross multiply
    394,715.80x = 591,393.30 × 183,921.40
  4. Step 4: Simplify right side
    394,715.80x = 108,769,883,686.62
  5. Step 5: Solve for x
    x = 108,769,883,686.62/394,715.80
  6. Step 6: Final answer
    x = 275,565.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.