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Finding the Fourth Proportional to 854.21, 1,281.81 and 334.19

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Solution

The fourth proportional to 854.21, 1,281.81 and 334.19 is: 501.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.21 : 1,281.81 = 334.19 : x
  2. Step 2: Convert to fraction form
    854.21/1,281.81 = 334.19/x
  3. Step 3: Cross multiply
    854.21x = 1,281.81 × 334.19
  4. Step 4: Simplify right side
    854.21x = 428,362.51
  5. Step 5: Solve for x
    x = 428,362.51/854.21
  6. Step 6: Final answer
    x = 501.47

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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.