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Finding the Fourth Proportional to 281.83, 420.35 and 268.21

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Solution

The fourth proportional to 281.83, 420.35 and 268.21 is: 400.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.83 : 420.35 = 268.21 : x
  2. Step 2: Convert to fraction form
    281.83/420.35 = 268.21/x
  3. Step 3: Cross multiply
    281.83x = 420.35 × 268.21
  4. Step 4: Simplify right side
    281.83x = 112,742.07
  5. Step 5: Solve for x
    x = 112,742.07/281.83
  6. Step 6: Final answer
    x = 400.04

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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.