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Finding the Fourth Proportional to 872,286.60, 1,203,578.82 and 509,640.42

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Solution

The fourth proportional to 872,286.60, 1,203,578.82 and 509,640.42 is: 703,200.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,286.60 : 1,203,578.82 = 509,640.42 : x
  2. Step 2: Convert to fraction form
    872,286.60/1,203,578.82 = 509,640.42/x
  3. Step 3: Cross multiply
    872,286.60x = 1,203,578.82 × 509,640.42
  4. Step 4: Simplify right side
    872,286.60x = 613,392,415,327.90
  5. Step 5: Solve for x
    x = 613,392,415,327.90/872,286.60
  6. Step 6: Final answer
    x = 703,200.55

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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.