Home / 1,391,742-1,920,608.01-811,309.77

Finding the Fourth Proportional to 1,391,742, 1,920,608.01 and 811,309.77

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Solution

The fourth proportional to 1,391,742, 1,920,608.01 and 811,309.77 is: 1,119,609.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,742 : 1,920,608.01 = 811,309.77 : x
  2. Step 2: Convert to fraction form
    1,391,742/1,920,608.01 = 811,309.77/x
  3. Step 3: Cross multiply
    1,391,742x = 1,920,608.01 × 811,309.77
  4. Step 4: Simplify right side
    1,391,742x = 1,558,208,042,853.26
  5. Step 5: Solve for x
    x = 1,558,208,042,853.26/1,391,742
  6. Step 6: Final answer
    x = 1,119,609.84

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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.