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Finding the Fourth Proportional to 287.89, 397.44 and 269.32

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Solution

The fourth proportional to 287.89, 397.44 and 269.32 is: 371.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.89 : 397.44 = 269.32 : x
  2. Step 2: Convert to fraction form
    287.89/397.44 = 269.32/x
  3. Step 3: Cross multiply
    287.89x = 397.44 × 269.32
  4. Step 4: Simplify right side
    287.89x = 107,038.54
  5. Step 5: Solve for x
    x = 107,038.54/287.89
  6. Step 6: Final answer
    x = 371.80

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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.