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Finding the Fourth Proportional to 908.50, 1,361.40 and 583.60

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Solution

The fourth proportional to 908.50, 1,361.40 and 583.60 is: 874.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.50 : 1,361.40 = 583.60 : x
  2. Step 2: Convert to fraction form
    908.50/1,361.40 = 583.60/x
  3. Step 3: Cross multiply
    908.50x = 1,361.40 × 583.60
  4. Step 4: Simplify right side
    908.50x = 794,513.04
  5. Step 5: Solve for x
    x = 794,513.04/908.50
  6. Step 6: Final answer
    x = 874.53

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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.