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Finding the Fourth Proportional to 419.63, 579.11 and 245.07

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Solution

The fourth proportional to 419.63, 579.11 and 245.07 is: 338.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.63 : 579.11 = 245.07 : x
  2. Step 2: Convert to fraction form
    419.63/579.11 = 245.07/x
  3. Step 3: Cross multiply
    419.63x = 579.11 × 245.07
  4. Step 4: Simplify right side
    419.63x = 141,921.26
  5. Step 5: Solve for x
    x = 141,921.26/419.63
  6. Step 6: Final answer
    x = 338.21

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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.