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Finding the Fourth Proportional to 978,079.20, 1,467,556.20 and 347,445.60

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Solution

The fourth proportional to 978,079.20, 1,467,556.20 and 347,445.60 is: 521,323.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,079.20 : 1,467,556.20 = 347,445.60 : x
  2. Step 2: Convert to fraction form
    978,079.20/1,467,556.20 = 347,445.60/x
  3. Step 3: Cross multiply
    978,079.20x = 1,467,556.20 × 347,445.60
  4. Step 4: Simplify right side
    978,079.20x = 509,895,944,442.72
  5. Step 5: Solve for x
    x = 509,895,944,442.72/978,079.20
  6. Step 6: Final answer
    x = 521,323.78

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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.