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Finding the Fourth Proportional to 899.98, 1,350.68 and 489.58

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Solution

The fourth proportional to 899.98, 1,350.68 and 489.58 is: 734.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.98 : 1,350.68 = 489.58 : x
  2. Step 2: Convert to fraction form
    899.98/1,350.68 = 489.58/x
  3. Step 3: Cross multiply
    899.98x = 1,350.68 × 489.58
  4. Step 4: Simplify right side
    899.98x = 661,260.09
  5. Step 5: Solve for x
    x = 661,260.09/899.98
  6. Step 6: Final answer
    x = 734.75

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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.