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Finding the Fourth Proportional to 519,948.60, 778,367.70 and 489,190.20

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Solution

The fourth proportional to 519,948.60, 778,367.70 and 489,190.20 is: 732,322.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,948.60 : 778,367.70 = 489,190.20 : x
  2. Step 2: Convert to fraction form
    519,948.60/778,367.70 = 489,190.20/x
  3. Step 3: Cross multiply
    519,948.60x = 778,367.70 × 489,190.20
  4. Step 4: Simplify right side
    519,948.60x = 380,769,850,836.54
  5. Step 5: Solve for x
    x = 380,769,850,836.54/519,948.60
  6. Step 6: Final answer
    x = 732,322.10

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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.