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Finding the Fourth Proportional to 519,641.20, 778,878.60 and 220,070.80

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Solution

The fourth proportional to 519,641.20, 778,878.60 and 220,070.80 is: 329,859.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,641.20 : 778,878.60 = 220,070.80 : x
  2. Step 2: Convert to fraction form
    519,641.20/778,878.60 = 220,070.80/x
  3. Step 3: Cross multiply
    519,641.20x = 778,878.60 × 220,070.80
  4. Step 4: Simplify right side
    519,641.20x = 171,408,436,604.88
  5. Step 5: Solve for x
    x = 171,408,436,604.88/519,641.20
  6. Step 6: Final answer
    x = 329,859.21

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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.