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Finding the Fourth Proportional to 1,100.89, 1,516.54 and 943

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Solution

The fourth proportional to 1,100.89, 1,516.54 and 943 is: 1,299.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.89 : 1,516.54 = 943 : x
  2. Step 2: Convert to fraction form
    1,100.89/1,516.54 = 943/x
  3. Step 3: Cross multiply
    1,100.89x = 1,516.54 × 943
  4. Step 4: Simplify right side
    1,100.89x = 1,430,092.51
  5. Step 5: Solve for x
    x = 1,430,092.51/1,100.89
  6. Step 6: Final answer
    x = 1,299.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.