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Finding the Fourth Proportional to 1,175.56, 1,764.42 and 628.36

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Solution

The fourth proportional to 1,175.56, 1,764.42 and 628.36 is: 943.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.56 : 1,764.42 = 628.36 : x
  2. Step 2: Convert to fraction form
    1,175.56/1,764.42 = 628.36/x
  3. Step 3: Cross multiply
    1,175.56x = 1,764.42 × 628.36
  4. Step 4: Simplify right side
    1,175.56x = 1,108,690.95
  5. Step 5: Solve for x
    x = 1,108,690.95/1,175.56
  6. Step 6: Final answer
    x = 943.12

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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.