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Finding the Fourth Proportional to 3,555.88, 4,907.20 and 1,984.20

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Solution

The fourth proportional to 3,555.88, 4,907.20 and 1,984.20 is: 2,738.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,555.88 : 4,907.20 = 1,984.20 : x
  2. Step 2: Convert to fraction form
    3,555.88/4,907.20 = 1,984.20/x
  3. Step 3: Cross multiply
    3,555.88x = 4,907.20 × 1,984.20
  4. Step 4: Simplify right side
    3,555.88x = 9,736,866.24
  5. Step 5: Solve for x
    x = 9,736,866.24/3,555.88
  6. Step 6: Final answer
    x = 2,738.24

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Double scale
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Similar ratio
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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.