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Finding the Fourth Proportional to 443.34, 668.52 and 438.48

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Solution

The fourth proportional to 443.34, 668.52 and 438.48 is: 661.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 668.52 = 438.48 : x
  2. Step 2: Convert to fraction form
    443.34/668.52 = 438.48/x
  3. Step 3: Cross multiply
    443.34x = 668.52 × 438.48
  4. Step 4: Simplify right side
    443.34x = 293,132.65
  5. Step 5: Solve for x
    x = 293,132.65/443.34
  6. Step 6: Final answer
    x = 661.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.