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Finding the Fourth Proportional to 855.69, 1,284.19 and 335.82

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Solution

The fourth proportional to 855.69, 1,284.19 and 335.82 is: 503.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.69 : 1,284.19 = 335.82 : x
  2. Step 2: Convert to fraction form
    855.69/1,284.19 = 335.82/x
  3. Step 3: Cross multiply
    855.69x = 1,284.19 × 335.82
  4. Step 4: Simplify right side
    855.69x = 431,261.47
  5. Step 5: Solve for x
    x = 431,261.47/855.69
  6. Step 6: Final answer
    x = 503.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.