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Finding the Fourth Proportional to 989,546.60, 1,388,164.60 and 989,546.60

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Solution

The fourth proportional to 989,546.60, 1,388,164.60 and 989,546.60 is: 1,388,164.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,546.60 : 1,388,164.60 = 989,546.60 : x
  2. Step 2: Convert to fraction form
    989,546.60/1,388,164.60 = 989,546.60/x
  3. Step 3: Cross multiply
    989,546.60x = 1,388,164.60 × 989,546.60
  4. Step 4: Simplify right side
    989,546.60x = 1,373,653,560,170.36
  5. Step 5: Solve for x
    x = 1,373,653,560,170.36/989,546.60
  6. Step 6: Final answer
    x = 1,388,164.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.