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Finding the Fourth Proportional to 978,081.30, 1,467,121.95 and 659,216.70

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Solution

The fourth proportional to 978,081.30, 1,467,121.95 and 659,216.70 is: 988,825.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,081.30 : 1,467,121.95 = 659,216.70 : x
  2. Step 2: Convert to fraction form
    978,081.30/1,467,121.95 = 659,216.70/x
  3. Step 3: Cross multiply
    978,081.30x = 1,467,121.95 × 659,216.70
  4. Step 4: Simplify right side
    978,081.30x = 967,151,290,376.57
  5. Step 5: Solve for x
    x = 967,151,290,376.57/978,081.30
  6. Step 6: Final answer
    x = 988,825.05

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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.