Home / 1,290,176.49-1,780,489.26-709,443.69

Finding the Fourth Proportional to 1,290,176.49, 1,780,489.26 and 709,443.69

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Solution

The fourth proportional to 1,290,176.49, 1,780,489.26 and 709,443.69 is: 979,057.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,176.49 : 1,780,489.26 = 709,443.69 : x
  2. Step 2: Convert to fraction form
    1,290,176.49/1,780,489.26 = 709,443.69/x
  3. Step 3: Cross multiply
    1,290,176.49x = 1,780,489.26 × 709,443.69
  4. Step 4: Simplify right side
    1,290,176.49x = 1,263,156,870,619.77
  5. Step 5: Solve for x
    x = 1,263,156,870,619.77/1,290,176.49
  6. Step 6: Final answer
    x = 979,057.42

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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.