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Finding the Fourth Proportional to 448.90, 620.09 and 351.93

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Solution

The fourth proportional to 448.90, 620.09 and 351.93 is: 486.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.90 : 620.09 = 351.93 : x
  2. Step 2: Convert to fraction form
    448.90/620.09 = 351.93/x
  3. Step 3: Cross multiply
    448.90x = 620.09 × 351.93
  4. Step 4: Simplify right side
    448.90x = 218,228.27
  5. Step 5: Solve for x
    x = 218,228.27/448.90
  6. Step 6: Final answer
    x = 486.14

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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.