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Finding the Fourth Proportional to 304.41, 419.40 and 289.29

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Solution

The fourth proportional to 304.41, 419.40 and 289.29 is: 398.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.41 : 419.40 = 289.29 : x
  2. Step 2: Convert to fraction form
    304.41/419.40 = 289.29/x
  3. Step 3: Cross multiply
    304.41x = 419.40 × 289.29
  4. Step 4: Simplify right side
    304.41x = 121,328.23
  5. Step 5: Solve for x
    x = 121,328.23/304.41
  6. Step 6: Final answer
    x = 398.57

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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.