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Finding the Fourth Proportional to 644.09, 895.01 and 637.40

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Solution

The fourth proportional to 644.09, 895.01 and 637.40 is: 885.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.09 : 895.01 = 637.40 : x
  2. Step 2: Convert to fraction form
    644.09/895.01 = 637.40/x
  3. Step 3: Cross multiply
    644.09x = 895.01 × 637.40
  4. Step 4: Simplify right side
    644.09x = 570,479.37
  5. Step 5: Solve for x
    x = 570,479.37/644.09
  6. Step 6: Final answer
    x = 885.71

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.