Home / 820,378.20-1,228,493.70-538,368.60

Finding the Fourth Proportional to 820,378.20, 1,228,493.70 and 538,368.60

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Solution

The fourth proportional to 820,378.20, 1,228,493.70 and 538,368.60 is: 806,192.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,378.20 : 1,228,493.70 = 538,368.60 : x
  2. Step 2: Convert to fraction form
    820,378.20/1,228,493.70 = 538,368.60/x
  3. Step 3: Cross multiply
    820,378.20x = 1,228,493.70 × 538,368.60
  4. Step 4: Simplify right side
    820,378.20x = 661,382,433,377.82
  5. Step 5: Solve for x
    x = 661,382,433,377.82/820,378.20
  6. Step 6: Final answer
    x = 806,192.11

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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.