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Finding the Fourth Proportional to 790.44, 1,090.80 and 436.37

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Solution

The fourth proportional to 790.44, 1,090.80 and 436.37 is: 602.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.44 : 1,090.80 = 436.37 : x
  2. Step 2: Convert to fraction form
    790.44/1,090.80 = 436.37/x
  3. Step 3: Cross multiply
    790.44x = 1,090.80 × 436.37
  4. Step 4: Simplify right side
    790.44x = 475,986.94
  5. Step 5: Solve for x
    x = 475,986.94/790.44
  6. Step 6: Final answer
    x = 602.18

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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.