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Finding the Fourth Proportional to 419.75, 579.24 and 253.92

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Solution

The fourth proportional to 419.75, 579.24 and 253.92 is: 350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.75 : 579.24 = 253.92 : x
  2. Step 2: Convert to fraction form
    419.75/579.24 = 253.92/x
  3. Step 3: Cross multiply
    419.75x = 579.24 × 253.92
  4. Step 4: Simplify right side
    419.75x = 147,080.62
  5. Step 5: Solve for x
    x = 147,080.62/419.75
  6. Step 6: Final answer
    x = 350.40

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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.