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Finding the Fourth Proportional to 520,039.60, 778,504.20 and 489,281.20

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Solution

The fourth proportional to 520,039.60, 778,504.20 and 489,281.20 is: 732,458.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.60 : 778,504.20 = 489,281.20 : x
  2. Step 2: Convert to fraction form
    520,039.60/778,504.20 = 489,281.20/x
  3. Step 3: Cross multiply
    520,039.60x = 778,504.20 × 489,281.20
  4. Step 4: Simplify right side
    520,039.60x = 380,907,469,181.04
  5. Step 5: Solve for x
    x = 380,907,469,181.04/520,039.60
  6. Step 6: Final answer
    x = 732,458.58

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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.