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Finding the Fourth Proportional to 448.39, 671.37 and 231.51

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Solution

The fourth proportional to 448.39, 671.37 and 231.51 is: 346.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.39 : 671.37 = 231.51 : x
  2. Step 2: Convert to fraction form
    448.39/671.37 = 231.51/x
  3. Step 3: Cross multiply
    448.39x = 671.37 × 231.51
  4. Step 4: Simplify right side
    448.39x = 155,428.87
  5. Step 5: Solve for x
    x = 155,428.87/448.39
  6. Step 6: Final answer
    x = 346.64

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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.