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Finding the Fourth Proportional to 978,529.60, 1,467,794.40 and 417,620.80

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Solution

The fourth proportional to 978,529.60, 1,467,794.40 and 417,620.80 is: 626,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,529.60 : 1,467,794.40 = 417,620.80 : x
  2. Step 2: Convert to fraction form
    978,529.60/1,467,794.40 = 417,620.80/x
  3. Step 3: Cross multiply
    978,529.60x = 1,467,794.40 × 417,620.80
  4. Step 4: Simplify right side
    978,529.60x = 612,981,471,563.52
  5. Step 5: Solve for x
    x = 612,981,471,563.52/978,529.60
  6. Step 6: Final answer
    x = 626,431.20

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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.