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Finding the Fourth Proportional to 671.69, 926.93 and 438.81

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Solution

The fourth proportional to 671.69, 926.93 and 438.81 is: 605.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.69 : 926.93 = 438.81 : x
  2. Step 2: Convert to fraction form
    671.69/926.93 = 438.81/x
  3. Step 3: Cross multiply
    671.69x = 926.93 × 438.81
  4. Step 4: Simplify right side
    671.69x = 406,746.15
  5. Step 5: Solve for x
    x = 406,746.15/671.69
  6. Step 6: Final answer
    x = 605.56

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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.