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Finding the Fourth Proportional to 978,187.20, 1,467,280.80 and 673,756.80

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Solution

The fourth proportional to 978,187.20, 1,467,280.80 and 673,756.80 is: 1,010,635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,187.20 : 1,467,280.80 = 673,756.80 : x
  2. Step 2: Convert to fraction form
    978,187.20/1,467,280.80 = 673,756.80/x
  3. Step 3: Cross multiply
    978,187.20x = 1,467,280.80 × 673,756.80
  4. Step 4: Simplify right side
    978,187.20x = 988,590,416,509.44
  5. Step 5: Solve for x
    x = 988,590,416,509.44/978,187.20
  6. Step 6: Final answer
    x = 1,010,635.20

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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.