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Finding the Fourth Proportional to 464.36, 696.44 and 139.65

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Solution

The fourth proportional to 464.36, 696.44 and 139.65 is: 209.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.36 : 696.44 = 139.65 : x
  2. Step 2: Convert to fraction form
    464.36/696.44 = 139.65/x
  3. Step 3: Cross multiply
    464.36x = 696.44 × 139.65
  4. Step 4: Simplify right side
    464.36x = 97,257.15
  5. Step 5: Solve for x
    x = 97,257.15/464.36
  6. Step 6: Final answer
    x = 209.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.