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Finding the Fourth Proportional to 380,979.97, 525,732.14 and 217,604.39

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Solution

The fourth proportional to 380,979.97, 525,732.14 and 217,604.39 is: 300,282.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,979.97 : 525,732.14 = 217,604.39 : x
  2. Step 2: Convert to fraction form
    380,979.97/525,732.14 = 217,604.39/x
  3. Step 3: Cross multiply
    380,979.97x = 525,732.14 × 217,604.39
  4. Step 4: Simplify right side
    380,979.97x = 114,401,618,999.43
  5. Step 5: Solve for x
    x = 114,401,618,999.43/380,979.97
  6. Step 6: Final answer
    x = 300,282.50

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1.5x scale

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.