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Finding the Fourth Proportional to 790.36, 1,090.78 and 441.08

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Solution

The fourth proportional to 790.36, 1,090.78 and 441.08 is: 608.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.36 : 1,090.78 = 441.08 : x
  2. Step 2: Convert to fraction form
    790.36/1,090.78 = 441.08/x
  3. Step 3: Cross multiply
    790.36x = 1,090.78 × 441.08
  4. Step 4: Simplify right side
    790.36x = 481,121.24
  5. Step 5: Solve for x
    x = 481,121.24/790.36
  6. Step 6: Final answer
    x = 608.74

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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.