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Finding the Fourth Proportional to 286,212.80, 394,953.92 and 158,878.40

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Solution

The fourth proportional to 286,212.80, 394,953.92 and 158,878.40 is: 219,241.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,212.80 : 394,953.92 = 158,878.40 : x
  2. Step 2: Convert to fraction form
    286,212.80/394,953.92 = 158,878.40/x
  3. Step 3: Cross multiply
    286,212.80x = 394,953.92 × 158,878.40
  4. Step 4: Simplify right side
    286,212.80x = 62,749,646,883.33
  5. Step 5: Solve for x
    x = 62,749,646,883.33/286,212.80
  6. Step 6: Final answer
    x = 219,241.23

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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.