Home / 1,389,634.32-1,916,172.48-905,301.28

Finding the Fourth Proportional to 1,389,634.32, 1,916,172.48 and 905,301.28

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Solution

The fourth proportional to 1,389,634.32, 1,916,172.48 and 905,301.28 is: 1,248,323.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,634.32 : 1,916,172.48 = 905,301.28 : x
  2. Step 2: Convert to fraction form
    1,389,634.32/1,916,172.48 = 905,301.28/x
  3. Step 3: Cross multiply
    1,389,634.32x = 1,916,172.48 × 905,301.28
  4. Step 4: Simplify right side
    1,389,634.32x = 1,734,713,398,844.77
  5. Step 5: Solve for x
    x = 1,734,713,398,844.77/1,389,634.32
  6. Step 6: Final answer
    x = 1,248,323.66

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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.