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Finding the Fourth Proportional to 978,123.20, 1,467,184.80 and 810,161.60

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Solution

The fourth proportional to 978,123.20, 1,467,184.80 and 810,161.60 is: 1,215,242.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,123.20 : 1,467,184.80 = 810,161.60 : x
  2. Step 2: Convert to fraction form
    978,123.20/1,467,184.80 = 810,161.60/x
  3. Step 3: Cross multiply
    978,123.20x = 1,467,184.80 × 810,161.60
  4. Step 4: Simplify right side
    978,123.20x = 1,188,656,785,063.68
  5. Step 5: Solve for x
    x = 1,188,656,785,063.68/978,123.20
  6. Step 6: Final answer
    x = 1,215,242.40

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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.