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Finding the Fourth Proportional to 281.18, 420.82 and 194.10

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Solution

The fourth proportional to 281.18, 420.82 and 194.10 is: 290.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.18 : 420.82 = 194.10 : x
  2. Step 2: Convert to fraction form
    281.18/420.82 = 194.10/x
  3. Step 3: Cross multiply
    281.18x = 420.82 × 194.10
  4. Step 4: Simplify right side
    281.18x = 81,681.16
  5. Step 5: Solve for x
    x = 81,681.16/281.18
  6. Step 6: Final answer
    x = 290.49

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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.