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Finding the Fourth Proportional to 448.73, 619.91 and 355.17

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Solution

The fourth proportional to 448.73, 619.91 and 355.17 is: 490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.73 : 619.91 = 355.17 : x
  2. Step 2: Convert to fraction form
    448.73/619.91 = 355.17/x
  3. Step 3: Cross multiply
    448.73x = 619.91 × 355.17
  4. Step 4: Simplify right side
    448.73x = 220,174.32
  5. Step 5: Solve for x
    x = 220,174.32/448.73
  6. Step 6: Final answer
    x = 490.67

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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.