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Finding the Fourth Proportional to 519,021.60, 777,610.80 and 321,799.20

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Solution

The fourth proportional to 519,021.60, 777,610.80 and 321,799.20 is: 482,127.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,021.60 : 777,610.80 = 321,799.20 : x
  2. Step 2: Convert to fraction form
    519,021.60/777,610.80 = 321,799.20/x
  3. Step 3: Cross multiply
    519,021.60x = 777,610.80 × 321,799.20
  4. Step 4: Simplify right side
    519,021.60x = 250,234,533,351.36
  5. Step 5: Solve for x
    x = 250,234,533,351.36/519,021.60
  6. Step 6: Final answer
    x = 482,127.40

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1.5x scale

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.