Home / 1,392,816.29-1,921,379.09-909,664.25

Finding the Fourth Proportional to 1,392,816.29, 1,921,379.09 and 909,664.25

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Solution

The fourth proportional to 1,392,816.29, 1,921,379.09 and 909,664.25 is: 1,254,874.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,816.29 : 1,921,379.09 = 909,664.25 : x
  2. Step 2: Convert to fraction form
    1,392,816.29/1,921,379.09 = 909,664.25/x
  3. Step 3: Cross multiply
    1,392,816.29x = 1,921,379.09 × 909,664.25
  4. Step 4: Simplify right side
    1,392,816.29x = 1,747,809,875,948.14
  5. Step 5: Solve for x
    x = 1,747,809,875,948.14/1,392,816.29
  6. Step 6: Final answer
    x = 1,254,874.66

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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.