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Finding the Fourth Proportional to 940,978.60, 1,412,072.70 and 520,556.20

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Solution

The fourth proportional to 940,978.60, 1,412,072.70 and 520,556.20 is: 781,168.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    940,978.60 : 1,412,072.70 = 520,556.20 : x
  2. Step 2: Convert to fraction form
    940,978.60/1,412,072.70 = 520,556.20/x
  3. Step 3: Cross multiply
    940,978.60x = 1,412,072.70 × 520,556.20
  4. Step 4: Simplify right side
    940,978.60x = 735,063,198,835.74
  5. Step 5: Solve for x
    x = 735,063,198,835.74/940,978.60
  6. Step 6: Final answer
    x = 781,168.88

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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.