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Finding the Fourth Proportional to 853.17, 1,280.07 and 333.15

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Solution

The fourth proportional to 853.17, 1,280.07 and 333.15 is: 499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.17 : 1,280.07 = 333.15 : x
  2. Step 2: Convert to fraction form
    853.17/1,280.07 = 333.15/x
  3. Step 3: Cross multiply
    853.17x = 1,280.07 × 333.15
  4. Step 4: Simplify right side
    853.17x = 426,455.32
  5. Step 5: Solve for x
    x = 426,455.32/853.17
  6. Step 6: Final answer
    x = 499.85

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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.