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Finding the Fourth Proportional to 785.73, 1,084.74 and 627.84

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Solution

The fourth proportional to 785.73, 1,084.74 and 627.84 is: 866.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.73 : 1,084.74 = 627.84 : x
  2. Step 2: Convert to fraction form
    785.73/1,084.74 = 627.84/x
  3. Step 3: Cross multiply
    785.73x = 1,084.74 × 627.84
  4. Step 4: Simplify right side
    785.73x = 681,043.16
  5. Step 5: Solve for x
    x = 681,043.16/785.73
  6. Step 6: Final answer
    x = 866.76

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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.