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Finding the Fourth Proportional to 728.22, 1,090.74 and 590.63

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Solution

The fourth proportional to 728.22, 1,090.74 and 590.63 is: 884.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.22 : 1,090.74 = 590.63 : x
  2. Step 2: Convert to fraction form
    728.22/1,090.74 = 590.63/x
  3. Step 3: Cross multiply
    728.22x = 1,090.74 × 590.63
  4. Step 4: Simplify right side
    728.22x = 644,218.31
  5. Step 5: Solve for x
    x = 644,218.31/728.22
  6. Step 6: Final answer
    x = 884.65

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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.