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Finding the Fourth Proportional to 325,329.92, 485,780.42 and 287,060.26

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Solution

The fourth proportional to 325,329.92, 485,780.42 and 287,060.26 is: 428,636.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,329.92 : 485,780.42 = 287,060.26 : x
  2. Step 2: Convert to fraction form
    325,329.92/485,780.42 = 287,060.26/x
  3. Step 3: Cross multiply
    325,329.92x = 485,780.42 × 287,060.26
  4. Step 4: Simplify right side
    325,329.92x = 139,448,252,232.81
  5. Step 5: Solve for x
    x = 139,448,252,232.81/325,329.92
  6. Step 6: Final answer
    x = 428,636.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.