Home / 820,949.18-1,231,428.16-538,428.78

Finding the Fourth Proportional to 820,949.18, 1,231,428.16 and 538,428.78

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Solution

The fourth proportional to 820,949.18, 1,231,428.16 and 538,428.78 is: 807,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,949.18 : 1,231,428.16 = 538,428.78 : x
  2. Step 2: Convert to fraction form
    820,949.18/1,231,428.16 = 538,428.78/x
  3. Step 3: Cross multiply
    820,949.18x = 1,231,428.16 × 538,428.78
  4. Step 4: Simplify right side
    820,949.18x = 663,036,361,846.45
  5. Step 5: Solve for x
    x = 663,036,361,846.45/820,949.18
  6. Step 6: Final answer
    x = 807,646.05

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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.