Home / 820,930.20-1,229,321.70-538,920.60

Finding the Fourth Proportional to 820,930.20, 1,229,321.70 and 538,920.60

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Solution

The fourth proportional to 820,930.20, 1,229,321.70 and 538,920.60 is: 807,019.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,930.20 : 1,229,321.70 = 538,920.60 : x
  2. Step 2: Convert to fraction form
    820,930.20/1,229,321.70 = 538,920.60/x
  3. Step 3: Cross multiply
    820,930.20x = 1,229,321.70 × 538,920.60
  4. Step 4: Simplify right side
    820,930.20x = 662,506,788,157.02
  5. Step 5: Solve for x
    x = 662,506,788,157.02/820,930.20
  6. Step 6: Final answer
    x = 807,019.63

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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.