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Finding the Fourth Proportional to 394,210.20, 591,185.70 and 144,859.80

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Solution

The fourth proportional to 394,210.20, 591,185.70 and 144,859.80 is: 217,242.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,210.20 : 591,185.70 = 144,859.80 : x
  2. Step 2: Convert to fraction form
    394,210.20/591,185.70 = 144,859.80/x
  3. Step 3: Cross multiply
    394,210.20x = 591,185.70 × 144,859.80
  4. Step 4: Simplify right side
    394,210.20x = 85,639,042,264.86
  5. Step 5: Solve for x
    x = 85,639,042,264.86/394,210.20
  6. Step 6: Final answer
    x = 217,242.08

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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.