Home / 725,145.09-1,085,388.48-387,341.07

Finding the Fourth Proportional to 725,145.09, 1,085,388.48 and 387,341.07

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Solution

The fourth proportional to 725,145.09, 1,085,388.48 and 387,341.07 is: 579,767.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,145.09 : 1,085,388.48 = 387,341.07 : x
  2. Step 2: Convert to fraction form
    725,145.09/1,085,388.48 = 387,341.07/x
  3. Step 3: Cross multiply
    725,145.09x = 1,085,388.48 × 387,341.07
  4. Step 4: Simplify right side
    725,145.09x = 420,415,535,208.87
  5. Step 5: Solve for x
    x = 420,415,535,208.87/725,145.09
  6. Step 6: Final answer
    x = 579,767.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.