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Finding the Fourth Proportional to 846.42, 1,269.54 and 261.39

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Solution

The fourth proportional to 846.42, 1,269.54 and 261.39 is: 392.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.42 : 1,269.54 = 261.39 : x
  2. Step 2: Convert to fraction form
    846.42/1,269.54 = 261.39/x
  3. Step 3: Cross multiply
    846.42x = 1,269.54 × 261.39
  4. Step 4: Simplify right side
    846.42x = 331,845.06
  5. Step 5: Solve for x
    x = 331,845.06/846.42
  6. Step 6: Final answer
    x = 392.06

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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.