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Finding the Fourth Proportional to 790.48, 1,090.80 and 441.22

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Solution

The fourth proportional to 790.48, 1,090.80 and 441.22 is: 608.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.48 : 1,090.80 = 441.22 : x
  2. Step 2: Convert to fraction form
    790.48/1,090.80 = 441.22/x
  3. Step 3: Cross multiply
    790.48x = 1,090.80 × 441.22
  4. Step 4: Simplify right side
    790.48x = 481,282.78
  5. Step 5: Solve for x
    x = 481,282.78/790.48
  6. Step 6: Final answer
    x = 608.85

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Double scale
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1.5x scale

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.