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Finding the Fourth Proportional to 285,515.35, 394,027.14 and 163,043.89

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Solution

The fourth proportional to 285,515.35, 394,027.14 and 163,043.89 is: 225,009.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,515.35 : 394,027.14 = 163,043.89 : x
  2. Step 2: Convert to fraction form
    285,515.35/394,027.14 = 163,043.89/x
  3. Step 3: Cross multiply
    285,515.35x = 394,027.14 × 163,043.89
  4. Step 4: Simplify right side
    285,515.35x = 64,243,717,671.17
  5. Step 5: Solve for x
    x = 64,243,717,671.17/285,515.35
  6. Step 6: Final answer
    x = 225,009.68

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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.