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Finding the Fourth Proportional to 790.57, 1,090.97 and 436.47

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Solution

The fourth proportional to 790.57, 1,090.97 and 436.47 is: 602.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.57 : 1,090.97 = 436.47 : x
  2. Step 2: Convert to fraction form
    790.57/1,090.97 = 436.47/x
  3. Step 3: Cross multiply
    790.57x = 1,090.97 × 436.47
  4. Step 4: Simplify right side
    790.57x = 476,181.27
  5. Step 5: Solve for x
    x = 476,181.27/790.57
  6. Step 6: Final answer
    x = 602.32

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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.