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Finding the Fourth Proportional to 671.03, 925.80 and 405.56

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Solution

The fourth proportional to 671.03, 925.80 and 405.56 is: 559.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.03 : 925.80 = 405.56 : x
  2. Step 2: Convert to fraction form
    671.03/925.80 = 405.56/x
  3. Step 3: Cross multiply
    671.03x = 925.80 × 405.56
  4. Step 4: Simplify right side
    671.03x = 375,467.45
  5. Step 5: Solve for x
    x = 375,467.45/671.03
  6. Step 6: Final answer
    x = 559.54

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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.