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Finding the Fourth Proportional to 521,485.20, 782,227.80 and 205,779.60

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Solution

The fourth proportional to 521,485.20, 782,227.80 and 205,779.60 is: 308,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,485.20 : 782,227.80 = 205,779.60 : x
  2. Step 2: Convert to fraction form
    521,485.20/782,227.80 = 205,779.60/x
  3. Step 3: Cross multiply
    521,485.20x = 782,227.80 × 205,779.60
  4. Step 4: Simplify right side
    521,485.20x = 160,966,523,792.88
  5. Step 5: Solve for x
    x = 160,966,523,792.88/521,485.20
  6. Step 6: Final answer
    x = 308,669.40

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Similar ratio
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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.