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Finding the Fourth Proportional to 448.51, 618.89 and 271.58

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Solution

The fourth proportional to 448.51, 618.89 and 271.58 is: 374.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.51 : 618.89 = 271.58 : x
  2. Step 2: Convert to fraction form
    448.51/618.89 = 271.58/x
  3. Step 3: Cross multiply
    448.51x = 618.89 × 271.58
  4. Step 4: Simplify right side
    448.51x = 168,073.69
  5. Step 5: Solve for x
    x = 168,073.69/448.51
  6. Step 6: Final answer
    x = 374.74

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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.