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Finding the Fourth Proportional to 394,661.84, 544,622.28 and 215,810

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Solution

The fourth proportional to 394,661.84, 544,622.28 and 215,810 is: 297,811.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,661.84 : 544,622.28 = 215,810 : x
  2. Step 2: Convert to fraction form
    394,661.84/544,622.28 = 215,810/x
  3. Step 3: Cross multiply
    394,661.84x = 544,622.28 × 215,810
  4. Step 4: Simplify right side
    394,661.84x = 117,534,934,246.80
  5. Step 5: Solve for x
    x = 117,534,934,246.80/394,661.84
  6. Step 6: Final answer
    x = 297,811.75

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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.