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Finding the Fourth Proportional to 978,105.08, 1,467,172.98 and 445,604.60

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Solution

The fourth proportional to 978,105.08, 1,467,172.98 and 445,604.60 is: 668,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,105.08 : 1,467,172.98 = 445,604.60 : x
  2. Step 2: Convert to fraction form
    978,105.08/1,467,172.98 = 445,604.60/x
  3. Step 3: Cross multiply
    978,105.08x = 1,467,172.98 × 445,604.60
  4. Step 4: Simplify right side
    978,105.08x = 653,779,028,883.71
  5. Step 5: Solve for x
    x = 653,779,028,883.71/978,105.08
  6. Step 6: Final answer
    x = 668,413.90

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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.