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Finding the Fourth Proportional to 3,326.57, 4,990.40 and 986.81

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Solution

The fourth proportional to 3,326.57, 4,990.40 and 986.81 is: 1,480.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326.57 : 4,990.40 = 986.81 : x
  2. Step 2: Convert to fraction form
    3,326.57/4,990.40 = 986.81/x
  3. Step 3: Cross multiply
    3,326.57x = 4,990.40 × 986.81
  4. Step 4: Simplify right side
    3,326.57x = 4,924,546.74
  5. Step 5: Solve for x
    x = 4,924,546.74/3,326.57
  6. Step 6: Final answer
    x = 1,480.37

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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.