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Finding the Fourth Proportional to 900.09, 1,350.74 and 489.36

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Solution

The fourth proportional to 900.09, 1,350.74 and 489.36 is: 734.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.09 : 1,350.74 = 489.36 : x
  2. Step 2: Convert to fraction form
    900.09/1,350.74 = 489.36/x
  3. Step 3: Cross multiply
    900.09x = 1,350.74 × 489.36
  4. Step 4: Simplify right side
    900.09x = 660,998.13
  5. Step 5: Solve for x
    x = 660,998.13/900.09
  6. Step 6: Final answer
    x = 734.37

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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.