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Finding the Fourth Proportional to 730.99, 1,097.25 and 489.21

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Solution

The fourth proportional to 730.99, 1,097.25 and 489.21 is: 734.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.99 : 1,097.25 = 489.21 : x
  2. Step 2: Convert to fraction form
    730.99/1,097.25 = 489.21/x
  3. Step 3: Cross multiply
    730.99x = 1,097.25 × 489.21
  4. Step 4: Simplify right side
    730.99x = 536,779.72
  5. Step 5: Solve for x
    x = 536,779.72/730.99
  6. Step 6: Final answer
    x = 734.32

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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.