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Finding the Fourth Proportional to 738.19, 1,107.12 and 218.20

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Solution

The fourth proportional to 738.19, 1,107.12 and 218.20 is: 327.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.19 : 1,107.12 = 218.20 : x
  2. Step 2: Convert to fraction form
    738.19/1,107.12 = 218.20/x
  3. Step 3: Cross multiply
    738.19x = 1,107.12 × 218.20
  4. Step 4: Simplify right side
    738.19x = 241,573.58
  5. Step 5: Solve for x
    x = 241,573.58/738.19
  6. Step 6: Final answer
    x = 327.25

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.