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Finding the Fourth Proportional to 286,003.91, 394,685.44 and 158,679.20

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Solution

The fourth proportional to 286,003.91, 394,685.44 and 158,679.20 is: 218,977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,003.91 : 394,685.44 = 158,679.20 : x
  2. Step 2: Convert to fraction form
    286,003.91/394,685.44 = 158,679.20/x
  3. Step 3: Cross multiply
    286,003.91x = 394,685.44 × 158,679.20
  4. Step 4: Simplify right side
    286,003.91x = 62,628,369,870.85
  5. Step 5: Solve for x
    x = 62,628,369,870.85/286,003.91
  6. Step 6: Final answer
    x = 218,977.32

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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.