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Finding the Fourth Proportional to 281.84, 419.76 and 272.24

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Solution

The fourth proportional to 281.84, 419.76 and 272.24 is: 405.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.84 : 419.76 = 272.24 : x
  2. Step 2: Convert to fraction form
    281.84/419.76 = 272.24/x
  3. Step 3: Cross multiply
    281.84x = 419.76 × 272.24
  4. Step 4: Simplify right side
    281.84x = 114,275.46
  5. Step 5: Solve for x
    x = 114,275.46/281.84
  6. Step 6: Final answer
    x = 405.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.