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Finding the Fourth Proportional to 285,638.96, 394,145.52 and 158,313.44

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Solution

The fourth proportional to 285,638.96, 394,145.52 and 158,313.44 is: 218,452.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,638.96 : 394,145.52 = 158,313.44 : x
  2. Step 2: Convert to fraction form
    285,638.96/394,145.52 = 158,313.44/x
  3. Step 3: Cross multiply
    285,638.96x = 394,145.52 × 158,313.44
  4. Step 4: Simplify right side
    285,638.96x = 62,398,533,131.79
  5. Step 5: Solve for x
    x = 62,398,533,131.79/285,638.96
  6. Step 6: Final answer
    x = 218,452.46

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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.