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Finding the Fourth Proportional to 521.69, 777.95 and 443.33

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Solution

The fourth proportional to 521.69, 777.95 and 443.33 is: 661.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.69 : 777.95 = 443.33 : x
  2. Step 2: Convert to fraction form
    521.69/777.95 = 443.33/x
  3. Step 3: Cross multiply
    521.69x = 777.95 × 443.33
  4. Step 4: Simplify right side
    521.69x = 344,882.47
  5. Step 5: Solve for x
    x = 344,882.47/521.69
  6. Step 6: Final answer
    x = 661.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.