Home / 1,102,990.16-1,521,890.32-643,896.38

Finding the Fourth Proportional to 1,102,990.16, 1,521,890.32 and 643,896.38

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Solution

The fourth proportional to 1,102,990.16, 1,521,890.32 and 643,896.38 is: 888,439.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102,990.16 : 1,521,890.32 = 643,896.38 : x
  2. Step 2: Convert to fraction form
    1,102,990.16/1,521,890.32 = 643,896.38/x
  3. Step 3: Cross multiply
    1,102,990.16x = 1,521,890.32 × 643,896.38
  4. Step 4: Simplify right side
    1,102,990.16x = 979,939,667,805.04
  5. Step 5: Solve for x
    x = 979,939,667,805.04/1,102,990.16
  6. Step 6: Final answer
    x = 888,439.18

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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.