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Finding the Fourth Proportional to 4,490.81, 6,733.08 and 1,990.63

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Solution

The fourth proportional to 4,490.81, 6,733.08 and 1,990.63 is: 2,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,490.81 : 6,733.08 = 1,990.63 : x
  2. Step 2: Convert to fraction form
    4,490.81/6,733.08 = 1,990.63/x
  3. Step 3: Cross multiply
    4,490.81x = 6,733.08 × 1,990.63
  4. Step 4: Simplify right side
    4,490.81x = 13,403,071.04
  5. Step 5: Solve for x
    x = 13,403,071.04/4,490.81
  6. Step 6: Final answer
    x = 2,984.56

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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.