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Finding the Fourth Proportional to 785.59, 1,084.22 and 475.09

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Solution

The fourth proportional to 785.59, 1,084.22 and 475.09 is: 655.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.59 : 1,084.22 = 475.09 : x
  2. Step 2: Convert to fraction form
    785.59/1,084.22 = 475.09/x
  3. Step 3: Cross multiply
    785.59x = 1,084.22 × 475.09
  4. Step 4: Simplify right side
    785.59x = 515,099.70
  5. Step 5: Solve for x
    x = 515,099.70/785.59
  6. Step 6: Final answer
    x = 655.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.