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Finding the Fourth Proportional to 855.03, 1,282.67 and 307.11

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Solution

The fourth proportional to 855.03, 1,282.67 and 307.11 is: 460.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.03 : 1,282.67 = 307.11 : x
  2. Step 2: Convert to fraction form
    855.03/1,282.67 = 307.11/x
  3. Step 3: Cross multiply
    855.03x = 1,282.67 × 307.11
  4. Step 4: Simplify right side
    855.03x = 393,919.25
  5. Step 5: Solve for x
    x = 393,919.25/855.03
  6. Step 6: Final answer
    x = 460.71

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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.