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Finding the Fourth Proportional to 1,724,605.22, 2,379,979.95 and 989,679.26

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Solution

The fourth proportional to 1,724,605.22, 2,379,979.95 and 989,679.26 is: 1,365,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724,605.22 : 2,379,979.95 = 989,679.26 : x
  2. Step 2: Convert to fraction form
    1,724,605.22/2,379,979.95 = 989,679.26/x
  3. Step 3: Cross multiply
    1,724,605.22x = 2,379,979.95 × 989,679.26
  4. Step 4: Simplify right side
    1,724,605.22x = 2,355,416,795,730.84
  5. Step 5: Solve for x
    x = 2,355,416,795,730.84/1,724,605.22
  6. Step 6: Final answer
    x = 1,365,771.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.