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Finding the Fourth Proportional to 285,789.60, 394,389 and 158,461.92

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Solution

The fourth proportional to 285,789.60, 394,389 and 158,461.92 is: 218,677.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,789.60 : 394,389 = 158,461.92 : x
  2. Step 2: Convert to fraction form
    285,789.60/394,389 = 158,461.92/x
  3. Step 3: Cross multiply
    285,789.60x = 394,389 × 158,461.92
  4. Step 4: Simplify right side
    285,789.60x = 62,495,638,166.88
  5. Step 5: Solve for x
    x = 62,495,638,166.88/285,789.60
  6. Step 6: Final answer
    x = 218,677.09

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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.