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Finding the Fourth Proportional to 519,940.80, 778,744.80 and 426,628.80

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Solution

The fourth proportional to 519,940.80, 778,744.80 and 426,628.80 is: 638,986.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,940.80 : 778,744.80 = 426,628.80 : x
  2. Step 2: Convert to fraction form
    519,940.80/778,744.80 = 426,628.80/x
  3. Step 3: Cross multiply
    519,940.80x = 778,744.80 × 426,628.80
  4. Step 4: Simplify right side
    519,940.80x = 332,234,959,530.24
  5. Step 5: Solve for x
    x = 332,234,959,530.24/519,940.80
  6. Step 6: Final answer
    x = 638,986.13

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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.