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Finding the Fourth Proportional to 672.74, 926.34 and 574.28

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Solution

The fourth proportional to 672.74, 926.34 and 574.28 is: 790.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.74 : 926.34 = 574.28 : x
  2. Step 2: Convert to fraction form
    672.74/926.34 = 574.28/x
  3. Step 3: Cross multiply
    672.74x = 926.34 × 574.28
  4. Step 4: Simplify right side
    672.74x = 531,978.54
  5. Step 5: Solve for x
    x = 531,978.54/672.74
  6. Step 6: Final answer
    x = 790.76

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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.