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Finding the Fourth Proportional to 539,138.20, 809,582.10 and 302,942.20

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Solution

The fourth proportional to 539,138.20, 809,582.10 and 302,942.20 is: 454,904.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,138.20 : 809,582.10 = 302,942.20 : x
  2. Step 2: Convert to fraction form
    539,138.20/809,582.10 = 302,942.20/x
  3. Step 3: Cross multiply
    539,138.20x = 809,582.10 × 302,942.20
  4. Step 4: Simplify right side
    539,138.20x = 245,256,582,454.62
  5. Step 5: Solve for x
    x = 245,256,582,454.62/539,138.20
  6. Step 6: Final answer
    x = 454,904.85

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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.