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Finding the Fourth Proportional to 704.84, 1,052.37 and 636.80

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Solution

The fourth proportional to 704.84, 1,052.37 and 636.80 is: 950.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.84 : 1,052.37 = 636.80 : x
  2. Step 2: Convert to fraction form
    704.84/1,052.37 = 636.80/x
  3. Step 3: Cross multiply
    704.84x = 1,052.37 × 636.80
  4. Step 4: Simplify right side
    704.84x = 670,149.22
  5. Step 5: Solve for x
    x = 670,149.22/704.84
  6. Step 6: Final answer
    x = 950.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.