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Finding the Fourth Proportional to 519,921.60, 778,327.20 and 489,163.20

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Solution

The fourth proportional to 519,921.60, 778,327.20 and 489,163.20 is: 732,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,921.60 : 778,327.20 = 489,163.20 : x
  2. Step 2: Convert to fraction form
    519,921.60/778,327.20 = 489,163.20/x
  3. Step 3: Cross multiply
    519,921.60x = 778,327.20 × 489,163.20
  4. Step 4: Simplify right side
    519,921.60x = 380,729,023,799.04
  5. Step 5: Solve for x
    x = 380,729,023,799.04/519,921.60
  6. Step 6: Final answer
    x = 732,281.61

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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.