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Finding the Fourth Proportional to 1,174, 1,619.24 and 988.48

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Solution

The fourth proportional to 1,174, 1,619.24 and 988.48 is: 1,363.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174 : 1,619.24 = 988.48 : x
  2. Step 2: Convert to fraction form
    1,174/1,619.24 = 988.48/x
  3. Step 3: Cross multiply
    1,174x = 1,619.24 × 988.48
  4. Step 4: Simplify right side
    1,174x = 1,600,586.36
  5. Step 5: Solve for x
    x = 1,600,586.36/1,174
  6. Step 6: Final answer
    x = 1,363.36

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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.