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Finding the Fourth Proportional to 519,707.20, 778,977.60 and 220,136.80

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Solution

The fourth proportional to 519,707.20, 778,977.60 and 220,136.80 is: 329,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,707.20 : 778,977.60 = 220,136.80 : x
  2. Step 2: Convert to fraction form
    519,707.20/778,977.60 = 220,136.80/x
  3. Step 3: Cross multiply
    519,707.20x = 778,977.60 × 220,136.80
  4. Step 4: Simplify right side
    519,707.20x = 171,481,636,135.68
  5. Step 5: Solve for x
    x = 171,481,636,135.68/519,707.20
  6. Step 6: Final answer
    x = 329,958.17

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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.