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Finding the Fourth Proportional to 675.05, 931.69 and 644.27

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Solution

The fourth proportional to 675.05, 931.69 and 644.27 is: 889.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.05 : 931.69 = 644.27 : x
  2. Step 2: Convert to fraction form
    675.05/931.69 = 644.27/x
  3. Step 3: Cross multiply
    675.05x = 931.69 × 644.27
  4. Step 4: Simplify right side
    675.05x = 600,259.92
  5. Step 5: Solve for x
    x = 600,259.92/675.05
  6. Step 6: Final answer
    x = 889.21

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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.