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Finding the Fourth Proportional to 519,766.80, 779,941.80 and 220,196.40

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Solution

The fourth proportional to 519,766.80, 779,941.80 and 220,196.40 is: 330,418.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,766.80 : 779,941.80 = 220,196.40 : x
  2. Step 2: Convert to fraction form
    519,766.80/779,941.80 = 220,196.40/x
  3. Step 3: Cross multiply
    519,766.80x = 779,941.80 × 220,196.40
  4. Step 4: Simplify right side
    519,766.80x = 171,740,376,569.52
  5. Step 5: Solve for x
    x = 171,740,376,569.52/519,766.80
  6. Step 6: Final answer
    x = 330,418.13

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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.