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Finding the Fourth Proportional to 448.44, 621.36 and 438.36

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Solution

The fourth proportional to 448.44, 621.36 and 438.36 is: 607.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.44 : 621.36 = 438.36 : x
  2. Step 2: Convert to fraction form
    448.44/621.36 = 438.36/x
  3. Step 3: Cross multiply
    448.44x = 621.36 × 438.36
  4. Step 4: Simplify right side
    448.44x = 272,379.37
  5. Step 5: Solve for x
    x = 272,379.37/448.44
  6. Step 6: Final answer
    x = 607.39

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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.