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Finding the Fourth Proportional to 485,594.87, 670,169.91 and 281,708.15

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Solution

The fourth proportional to 485,594.87, 670,169.91 and 281,708.15 is: 388,785.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,594.87 : 670,169.91 = 281,708.15 : x
  2. Step 2: Convert to fraction form
    485,594.87/670,169.91 = 281,708.15/x
  3. Step 3: Cross multiply
    485,594.87x = 670,169.91 × 281,708.15
  4. Step 4: Simplify right side
    485,594.87x = 188,792,322,180.92
  5. Step 5: Solve for x
    x = 188,792,322,180.92/485,594.87
  6. Step 6: Final answer
    x = 388,785.66

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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.