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Finding the Fourth Proportional to 981.34, 1,353.99 and 583.02

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Solution

The fourth proportional to 981.34, 1,353.99 and 583.02 is: 804.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.34 : 1,353.99 = 583.02 : x
  2. Step 2: Convert to fraction form
    981.34/1,353.99 = 583.02/x
  3. Step 3: Cross multiply
    981.34x = 1,353.99 × 583.02
  4. Step 4: Simplify right side
    981.34x = 789,407.60
  5. Step 5: Solve for x
    x = 789,407.60/981.34
  6. Step 6: Final answer
    x = 804.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.