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Finding the Fourth Proportional to 988.90, 1,480.23 and 884.54

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Solution

The fourth proportional to 988.90, 1,480.23 and 884.54 is: 1,324.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.90 : 1,480.23 = 884.54 : x
  2. Step 2: Convert to fraction form
    988.90/1,480.23 = 884.54/x
  3. Step 3: Cross multiply
    988.90x = 1,480.23 × 884.54
  4. Step 4: Simplify right side
    988.90x = 1,309,326.34
  5. Step 5: Solve for x
    x = 1,309,326.34/988.90
  6. Step 6: Final answer
    x = 1,324.03

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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.