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Finding the Fourth Proportional to 3,555.78, 4,907.13 and 1,983.88

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Solution

The fourth proportional to 3,555.78, 4,907.13 and 1,983.88 is: 2,737.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,555.78 : 4,907.13 = 1,983.88 : x
  2. Step 2: Convert to fraction form
    3,555.78/4,907.13 = 1,983.88/x
  3. Step 3: Cross multiply
    3,555.78x = 4,907.13 × 1,983.88
  4. Step 4: Simplify right side
    3,555.78x = 9,735,157.06
  5. Step 5: Solve for x
    x = 9,735,157.06/3,555.78
  6. Step 6: Final answer
    x = 2,737.84

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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.