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Finding the Fourth Proportional to 286,044.21, 394,752.42 and 156,987.23

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Solution

The fourth proportional to 286,044.21, 394,752.42 and 156,987.23 is: 216,648.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,044.21 : 394,752.42 = 156,987.23 : x
  2. Step 2: Convert to fraction form
    286,044.21/394,752.42 = 156,987.23/x
  3. Step 3: Cross multiply
    286,044.21x = 394,752.42 × 156,987.23
  4. Step 4: Simplify right side
    286,044.21x = 61,971,086,977.83
  5. Step 5: Solve for x
    x = 61,971,086,977.83/286,044.21
  6. Step 6: Final answer
    x = 216,648.63

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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.