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Finding the Fourth Proportional to 448.89, 619.06 and 291.36

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Solution

The fourth proportional to 448.89, 619.06 and 291.36 is: 401.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.89 : 619.06 = 291.36 : x
  2. Step 2: Convert to fraction form
    448.89/619.06 = 291.36/x
  3. Step 3: Cross multiply
    448.89x = 619.06 × 291.36
  4. Step 4: Simplify right side
    448.89x = 180,369.32
  5. Step 5: Solve for x
    x = 180,369.32/448.89
  6. Step 6: Final answer
    x = 401.81

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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.