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Finding the Fourth Proportional to 557,642.40, 835,540.20 and 320,571.60

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Solution

The fourth proportional to 557,642.40, 835,540.20 and 320,571.60 is: 480,326.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,642.40 : 835,540.20 = 320,571.60 : x
  2. Step 2: Convert to fraction form
    557,642.40/835,540.20 = 320,571.60/x
  3. Step 3: Cross multiply
    557,642.40x = 835,540.20 × 320,571.60
  4. Step 4: Simplify right side
    557,642.40x = 267,850,458,778.32
  5. Step 5: Solve for x
    x = 267,850,458,778.32/557,642.40
  6. Step 6: Final answer
    x = 480,326.57

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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.