Home / 1,428,165.90-1,970,868.78-816,331.73

Finding the Fourth Proportional to 1,428,165.90, 1,970,868.78 and 816,331.73

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Solution

The fourth proportional to 1,428,165.90, 1,970,868.78 and 816,331.73 is: 1,126,537.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,165.90 : 1,970,868.78 = 816,331.73 : x
  2. Step 2: Convert to fraction form
    1,428,165.90/1,970,868.78 = 816,331.73/x
  3. Step 3: Cross multiply
    1,428,165.90x = 1,970,868.78 × 816,331.73
  4. Step 4: Simplify right side
    1,428,165.90x = 1,608,882,710,926.05
  5. Step 5: Solve for x
    x = 1,608,882,710,926.05/1,428,165.90
  6. Step 6: Final answer
    x = 1,126,537.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.