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Finding the Fourth Proportional to 394,476, 544,376.88 and 215,628

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Solution

The fourth proportional to 394,476, 544,376.88 and 215,628 is: 297,566.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,476 : 544,376.88 = 215,628 : x
  2. Step 2: Convert to fraction form
    394,476/544,376.88 = 215,628/x
  3. Step 3: Cross multiply
    394,476x = 544,376.88 × 215,628
  4. Step 4: Simplify right side
    394,476x = 117,382,897,880.64
  5. Step 5: Solve for x
    x = 117,382,897,880.64/394,476
  6. Step 6: Final answer
    x = 297,566.64

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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.