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Finding the Fourth Proportional to 287.15, 431.69 and 227.01

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Solution

The fourth proportional to 287.15, 431.69 and 227.01 is: 341.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.15 : 431.69 = 227.01 : x
  2. Step 2: Convert to fraction form
    287.15/431.69 = 227.01/x
  3. Step 3: Cross multiply
    287.15x = 431.69 × 227.01
  4. Step 4: Simplify right side
    287.15x = 97,997.95
  5. Step 5: Solve for x
    x = 97,997.95/287.15
  6. Step 6: Final answer
    x = 341.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.