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Finding the Fourth Proportional to 448.35, 618.15 and 343.14

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Solution

The fourth proportional to 448.35, 618.15 and 343.14 is: 473.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.35 : 618.15 = 343.14 : x
  2. Step 2: Convert to fraction form
    448.35/618.15 = 343.14/x
  3. Step 3: Cross multiply
    448.35x = 618.15 × 343.14
  4. Step 4: Simplify right side
    448.35x = 212,111.99
  5. Step 5: Solve for x
    x = 212,111.99/448.35
  6. Step 6: Final answer
    x = 473.09

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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.