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Finding the Fourth Proportional to 1,147.26, 1,583.19 and 649.89

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Solution

The fourth proportional to 1,147.26, 1,583.19 and 649.89 is: 896.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.26 : 1,583.19 = 649.89 : x
  2. Step 2: Convert to fraction form
    1,147.26/1,583.19 = 649.89/x
  3. Step 3: Cross multiply
    1,147.26x = 1,583.19 × 649.89
  4. Step 4: Simplify right side
    1,147.26x = 1,028,899.35
  5. Step 5: Solve for x
    x = 1,028,899.35/1,147.26
  6. Step 6: Final answer
    x = 896.83

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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.