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Finding the Fourth Proportional to 448.95, 619.08 and 330.75

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Solution

The fourth proportional to 448.95, 619.08 and 330.75 is: 456.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.95 : 619.08 = 330.75 : x
  2. Step 2: Convert to fraction form
    448.95/619.08 = 330.75/x
  3. Step 3: Cross multiply
    448.95x = 619.08 × 330.75
  4. Step 4: Simplify right side
    448.95x = 204,760.71
  5. Step 5: Solve for x
    x = 204,760.71/448.95
  6. Step 6: Final answer
    x = 456.09

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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.