Home / 872,395.12-1,203,910.32-490,418.56

Finding the Fourth Proportional to 872,395.12, 1,203,910.32 and 490,418.56

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Solution

The fourth proportional to 872,395.12, 1,203,910.32 and 490,418.56 is: 676,780.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,395.12 : 1,203,910.32 = 490,418.56 : x
  2. Step 2: Convert to fraction form
    872,395.12/1,203,910.32 = 490,418.56/x
  3. Step 3: Cross multiply
    872,395.12x = 1,203,910.32 × 490,418.56
  4. Step 4: Simplify right side
    872,395.12x = 590,419,965,503.54
  5. Step 5: Solve for x
    x = 590,419,965,503.54/872,395.12
  6. Step 6: Final answer
    x = 676,780.45

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1.5x scale

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.