Home / 820,938.20-1,231,407.30-521,756.60

Finding the Fourth Proportional to 820,938.20, 1,231,407.30 and 521,756.60

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Solution

The fourth proportional to 820,938.20, 1,231,407.30 and 521,756.60 is: 782,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,938.20 : 1,231,407.30 = 521,756.60 : x
  2. Step 2: Convert to fraction form
    820,938.20/1,231,407.30 = 521,756.60/x
  3. Step 3: Cross multiply
    820,938.20x = 1,231,407.30 × 521,756.60
  4. Step 4: Simplify right side
    820,938.20x = 642,494,886,063.18
  5. Step 5: Solve for x
    x = 642,494,886,063.18/820,938.20
  6. Step 6: Final answer
    x = 782,634.90

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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.