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Finding the Fourth Proportional to 671.19, 926.25 and 438.32

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Solution

The fourth proportional to 671.19, 926.25 and 438.32 is: 604.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.19 : 926.25 = 438.32 : x
  2. Step 2: Convert to fraction form
    671.19/926.25 = 438.32/x
  3. Step 3: Cross multiply
    671.19x = 926.25 × 438.32
  4. Step 4: Simplify right side
    671.19x = 405,987.08
  5. Step 5: Solve for x
    x = 405,987.08/671.19
  6. Step 6: Final answer
    x = 604.88

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Half scale
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Double scale
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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.