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Finding the Fourth Proportional to 855.37, 1,282.20 and 334.66

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Solution

The fourth proportional to 855.37, 1,282.20 and 334.66 is: 501.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.37 : 1,282.20 = 334.66 : x
  2. Step 2: Convert to fraction form
    855.37/1,282.20 = 334.66/x
  3. Step 3: Cross multiply
    855.37x = 1,282.20 × 334.66
  4. Step 4: Simplify right side
    855.37x = 429,094.64
  5. Step 5: Solve for x
    x = 429,094.64/855.37
  6. Step 6: Final answer
    x = 501.65

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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.