Home / 1,428,459.69-1,971,331.21-783,902.95

Finding the Fourth Proportional to 1,428,459.69, 1,971,331.21 and 783,902.95

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Solution

The fourth proportional to 1,428,459.69, 1,971,331.21 and 783,902.95 is: 1,081,817.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,459.69 : 1,971,331.21 = 783,902.95 : x
  2. Step 2: Convert to fraction form
    1,428,459.69/1,971,331.21 = 783,902.95/x
  3. Step 3: Cross multiply
    1,428,459.69x = 1,971,331.21 × 783,902.95
  4. Step 4: Simplify right side
    1,428,459.69x = 1,545,332,355,874.40
  5. Step 5: Solve for x
    x = 1,545,332,355,874.40/1,428,459.69
  6. Step 6: Final answer
    x = 1,081,817.26

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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.