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Finding the Fourth Proportional to 648.81, 895.44 and 369.09

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Solution

The fourth proportional to 648.81, 895.44 and 369.09 is: 509.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.81 : 895.44 = 369.09 : x
  2. Step 2: Convert to fraction form
    648.81/895.44 = 369.09/x
  3. Step 3: Cross multiply
    648.81x = 895.44 × 369.09
  4. Step 4: Simplify right side
    648.81x = 330,496.10
  5. Step 5: Solve for x
    x = 330,496.10/648.81
  6. Step 6: Final answer
    x = 509.39

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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.