Home / 1,428,478.94-1,971,357.81-783,922.21

Finding the Fourth Proportional to 1,428,478.94, 1,971,357.81 and 783,922.21

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Solution

The fourth proportional to 1,428,478.94, 1,971,357.81 and 783,922.21 is: 1,081,843.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,478.94 : 1,971,357.81 = 783,922.21 : x
  2. Step 2: Convert to fraction form
    1,428,478.94/1,971,357.81 = 783,922.21/x
  3. Step 3: Cross multiply
    1,428,478.94x = 1,971,357.81 × 783,922.21
  4. Step 4: Simplify right side
    1,428,478.94x = 1,545,391,163,247.86
  5. Step 5: Solve for x
    x = 1,545,391,163,247.86/1,428,478.94
  6. Step 6: Final answer
    x = 1,081,843.85

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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.