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Finding the Fourth Proportional to 399,265.62, 550,977.98 and 217,968.72

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Solution

The fourth proportional to 399,265.62, 550,977.98 and 217,968.72 is: 300,792.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,265.62 : 550,977.98 = 217,968.72 : x
  2. Step 2: Convert to fraction form
    399,265.62/550,977.98 = 217,968.72/x
  3. Step 3: Cross multiply
    399,265.62x = 550,977.98 × 217,968.72
  4. Step 4: Simplify right side
    399,265.62x = 120,095,963,958.94
  5. Step 5: Solve for x
    x = 120,095,963,958.94/399,265.62
  6. Step 6: Final answer
    x = 300,792.15

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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.