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Finding the Fourth Proportional to 519,022.60, 777,612.30 and 321,800.20

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Solution

The fourth proportional to 519,022.60, 777,612.30 and 321,800.20 is: 482,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,022.60 : 777,612.30 = 321,800.20 : x
  2. Step 2: Convert to fraction form
    519,022.60/777,612.30 = 321,800.20/x
  3. Step 3: Cross multiply
    519,022.60x = 777,612.30 × 321,800.20
  4. Step 4: Simplify right side
    519,022.60x = 250,235,793,662.46
  5. Step 5: Solve for x
    x = 250,235,793,662.46/519,022.60
  6. Step 6: Final answer
    x = 482,128.90

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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.