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Finding the Fourth Proportional to 394,457.88, 544,356.54 and 215,609.88

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Solution

The fourth proportional to 394,457.88, 544,356.54 and 215,609.88 is: 297,544.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,457.88 : 544,356.54 = 215,609.88 : x
  2. Step 2: Convert to fraction form
    394,457.88/544,356.54 = 215,609.88/x
  3. Step 3: Cross multiply
    394,457.88x = 544,356.54 × 215,609.88
  4. Step 4: Simplify right side
    394,457.88x = 117,368,648,266.62
  5. Step 5: Solve for x
    x = 117,368,648,266.62/394,457.88
  6. Step 6: Final answer
    x = 297,544.18

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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.