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Finding the Fourth Proportional to 978,081.20, 1,467,559.20 and 347,447.60

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Solution

The fourth proportional to 978,081.20, 1,467,559.20 and 347,447.60 is: 521,326.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,081.20 : 1,467,559.20 = 347,447.60 : x
  2. Step 2: Convert to fraction form
    978,081.20/1,467,559.20 = 347,447.60/x
  3. Step 3: Cross multiply
    978,081.20x = 1,467,559.20 × 347,447.60
  4. Step 4: Simplify right side
    978,081.20x = 509,899,921,897.92
  5. Step 5: Solve for x
    x = 509,899,921,897.92/978,081.20
  6. Step 6: Final answer
    x = 521,326.78

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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.