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Finding the Fourth Proportional to 1,979,972.56, 2,969,482.74 and 913,990.60

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Solution

The fourth proportional to 1,979,972.56, 2,969,482.74 and 913,990.60 is: 1,370,766.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979,972.56 : 2,969,482.74 = 913,990.60 : x
  2. Step 2: Convert to fraction form
    1,979,972.56/2,969,482.74 = 913,990.60/x
  3. Step 3: Cross multiply
    1,979,972.56x = 2,969,482.74 × 913,990.60
  4. Step 4: Simplify right side
    1,979,972.56x = 2,714,079,311,222.24
  5. Step 5: Solve for x
    x = 2,714,079,311,222.24/1,979,972.56
  6. Step 6: Final answer
    x = 1,370,766.12

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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.