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Finding the Fourth Proportional to 899.46, 1,350.68 and 680.09

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Solution

The fourth proportional to 899.46, 1,350.68 and 680.09 is: 1,021.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.46 : 1,350.68 = 680.09 : x
  2. Step 2: Convert to fraction form
    899.46/1,350.68 = 680.09/x
  3. Step 3: Cross multiply
    899.46x = 1,350.68 × 680.09
  4. Step 4: Simplify right side
    899.46x = 918,573.81
  5. Step 5: Solve for x
    x = 918,573.81/899.46
  6. Step 6: Final answer
    x = 1,021.25

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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.