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Finding the Fourth Proportional to 448.74, 620.33 and 356.13

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Solution

The fourth proportional to 448.74, 620.33 and 356.13 is: 492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.74 : 620.33 = 356.13 : x
  2. Step 2: Convert to fraction form
    448.74/620.33 = 356.13/x
  3. Step 3: Cross multiply
    448.74x = 620.33 × 356.13
  4. Step 4: Simplify right side
    448.74x = 220,916.34
  5. Step 5: Solve for x
    x = 220,916.34/448.74
  6. Step 6: Final answer
    x = 492.30

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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.