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Finding the Fourth Proportional to 671.98, 927.74 and 439.51

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Solution

The fourth proportional to 671.98, 927.74 and 439.51 is: 606.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.98 : 927.74 = 439.51 : x
  2. Step 2: Convert to fraction form
    671.98/927.74 = 439.51/x
  3. Step 3: Cross multiply
    671.98x = 927.74 × 439.51
  4. Step 4: Simplify right side
    671.98x = 407,746.49
  5. Step 5: Solve for x
    x = 407,746.49/671.98
  6. Step 6: Final answer
    x = 606.79

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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.