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Finding the Fourth Proportional to 2,485.80, 3,728.94 and 1,098.96

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Solution

The fourth proportional to 2,485.80, 3,728.94 and 1,098.96 is: 1,648.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.80 : 3,728.94 = 1,098.96 : x
  2. Step 2: Convert to fraction form
    2,485.80/3,728.94 = 1,098.96/x
  3. Step 3: Cross multiply
    2,485.80x = 3,728.94 × 1,098.96
  4. Step 4: Simplify right side
    2,485.80x = 4,097,955.90
  5. Step 5: Solve for x
    x = 4,097,955.90/2,485.80
  6. Step 6: Final answer
    x = 1,648.55

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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.