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Finding the Fourth Proportional to 1,079.52, 1,489.44 and 637.56

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Solution

The fourth proportional to 1,079.52, 1,489.44 and 637.56 is: 879.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.52 : 1,489.44 = 637.56 : x
  2. Step 2: Convert to fraction form
    1,079.52/1,489.44 = 637.56/x
  3. Step 3: Cross multiply
    1,079.52x = 1,489.44 × 637.56
  4. Step 4: Simplify right side
    1,079.52x = 949,607.37
  5. Step 5: Solve for x
    x = 949,607.37/1,079.52
  6. Step 6: Final answer
    x = 879.66

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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.