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Finding the Fourth Proportional to 281.94, 423.51 and 231.31

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Solution

The fourth proportional to 281.94, 423.51 and 231.31 is: 347.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.94 : 423.51 = 231.31 : x
  2. Step 2: Convert to fraction form
    281.94/423.51 = 231.31/x
  3. Step 3: Cross multiply
    281.94x = 423.51 × 231.31
  4. Step 4: Simplify right side
    281.94x = 97,962.10
  5. Step 5: Solve for x
    x = 97,962.10/281.94
  6. Step 6: Final answer
    x = 347.46

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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.