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Finding the Fourth Proportional to 703.75, 1,056.11 and 247.75

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Solution

The fourth proportional to 703.75, 1,056.11 and 247.75 is: 371.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.75 : 1,056.11 = 247.75 : x
  2. Step 2: Convert to fraction form
    703.75/1,056.11 = 247.75/x
  3. Step 3: Cross multiply
    703.75x = 1,056.11 × 247.75
  4. Step 4: Simplify right side
    703.75x = 261,651.25
  5. Step 5: Solve for x
    x = 261,651.25/703.75
  6. Step 6: Final answer
    x = 371.80

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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.