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Finding the Fourth Proportional to 816.95, 1,222.99 and 654.14

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Solution

The fourth proportional to 816.95, 1,222.99 and 654.14 is: 979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.95 : 1,222.99 = 654.14 : x
  2. Step 2: Convert to fraction form
    816.95/1,222.99 = 654.14/x
  3. Step 3: Cross multiply
    816.95x = 1,222.99 × 654.14
  4. Step 4: Simplify right side
    816.95x = 799,998.93
  5. Step 5: Solve for x
    x = 799,998.93/816.95
  6. Step 6: Final answer
    x = 979.26

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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.