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Finding the Fourth Proportional to 902.93, 1,352.67 and 720.11

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Solution

The fourth proportional to 902.93, 1,352.67 and 720.11 is: 1,078.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.93 : 1,352.67 = 720.11 : x
  2. Step 2: Convert to fraction form
    902.93/1,352.67 = 720.11/x
  3. Step 3: Cross multiply
    902.93x = 1,352.67 × 720.11
  4. Step 4: Simplify right side
    902.93x = 974,064.43
  5. Step 5: Solve for x
    x = 974,064.43/902.93
  6. Step 6: Final answer
    x = 1,078.79

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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.