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Finding the Fourth Proportional to 978,130.20, 1,467,195.30 and 810,168.60

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Solution

The fourth proportional to 978,130.20, 1,467,195.30 and 810,168.60 is: 1,215,252.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,130.20 : 1,467,195.30 = 810,168.60 : x
  2. Step 2: Convert to fraction form
    978,130.20/1,467,195.30 = 810,168.60/x
  3. Step 3: Cross multiply
    978,130.20x = 1,467,195.30 × 810,168.60
  4. Step 4: Simplify right side
    978,130.20x = 1,188,675,562,127.58
  5. Step 5: Solve for x
    x = 1,188,675,562,127.58/978,130.20
  6. Step 6: Final answer
    x = 1,215,252.90

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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.