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Finding the Fourth Proportional to 281.12, 420.48 and 219.52

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Solution

The fourth proportional to 281.12, 420.48 and 219.52 is: 328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.12 : 420.48 = 219.52 : x
  2. Step 2: Convert to fraction form
    281.12/420.48 = 219.52/x
  3. Step 3: Cross multiply
    281.12x = 420.48 × 219.52
  4. Step 4: Simplify right side
    281.12x = 92,303.77
  5. Step 5: Solve for x
    x = 92,303.77/281.12
  6. Step 6: Final answer
    x = 328.34

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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.