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Finding the Fourth Proportional to 1,094.04, 1,643.09 and 911.79

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Solution

The fourth proportional to 1,094.04, 1,643.09 and 911.79 is: 1,369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,094.04 : 1,643.09 = 911.79 : x
  2. Step 2: Convert to fraction form
    1,094.04/1,643.09 = 911.79/x
  3. Step 3: Cross multiply
    1,094.04x = 1,643.09 × 911.79
  4. Step 4: Simplify right side
    1,094.04x = 1,498,148.47
  5. Step 5: Solve for x
    x = 1,498,148.47/1,094.04
  6. Step 6: Final answer
    x = 1,369.37

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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.