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Finding the Fourth Proportional to 899.25, 1,348.20 and 488.31

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Solution

The fourth proportional to 899.25, 1,348.20 and 488.31 is: 732.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.25 : 1,348.20 = 488.31 : x
  2. Step 2: Convert to fraction form
    899.25/1,348.20 = 488.31/x
  3. Step 3: Cross multiply
    899.25x = 1,348.20 × 488.31
  4. Step 4: Simplify right side
    899.25x = 658,339.54
  5. Step 5: Solve for x
    x = 658,339.54/899.25
  6. Step 6: Final answer
    x = 732.10

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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.