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Finding the Fourth Proportional to 671.13, 926.16 and 438.25

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Solution

The fourth proportional to 671.13, 926.16 and 438.25 is: 604.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.13 : 926.16 = 438.25 : x
  2. Step 2: Convert to fraction form
    671.13/926.16 = 438.25/x
  3. Step 3: Cross multiply
    671.13x = 926.16 × 438.25
  4. Step 4: Simplify right side
    671.13x = 405,887.43
  5. Step 5: Solve for x
    x = 405,887.43/671.13
  6. Step 6: Final answer
    x = 604.79

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1.5x scale

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.