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Finding the Fourth Proportional to 304.29, 419.19 and 210.87

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Solution

The fourth proportional to 304.29, 419.19 and 210.87 is: 290.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.29 : 419.19 = 210.87 : x
  2. Step 2: Convert to fraction form
    304.29/419.19 = 210.87/x
  3. Step 3: Cross multiply
    304.29x = 419.19 × 210.87
  4. Step 4: Simplify right side
    304.29x = 88,394.60
  5. Step 5: Solve for x
    x = 88,394.60/304.29
  6. Step 6: Final answer
    x = 290.49

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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.