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Finding the Fourth Proportional to 557,716.40, 835,651.20 and 320,645.60

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Solution

The fourth proportional to 557,716.40, 835,651.20 and 320,645.60 is: 480,437.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,716.40 : 835,651.20 = 320,645.60 : x
  2. Step 2: Convert to fraction form
    557,716.40/835,651.20 = 320,645.60/x
  3. Step 3: Cross multiply
    557,716.40x = 835,651.20 × 320,645.60
  4. Step 4: Simplify right side
    557,716.40x = 267,947,880,414.72
  5. Step 5: Solve for x
    x = 267,947,880,414.72/557,716.40
  6. Step 6: Final answer
    x = 480,437.51

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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.