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Finding the Fourth Proportional to 521,511.60, 780,517.80 and 521,511.60

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Solution

The fourth proportional to 521,511.60, 780,517.80 and 521,511.60 is: 780,517.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,511.60 : 780,517.80 = 521,511.60 : x
  2. Step 2: Convert to fraction form
    521,511.60/780,517.80 = 521,511.60/x
  3. Step 3: Cross multiply
    521,511.60x = 780,517.80 × 521,511.60
  4. Step 4: Simplify right side
    521,511.60x = 407,049,086,706.48
  5. Step 5: Solve for x
    x = 407,049,086,706.48/521,511.60
  6. Step 6: Final answer
    x = 780,517.80

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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.