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Finding the Fourth Proportional to 258,245.79, 356,378.82 and 143,520.83

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Solution

The fourth proportional to 258,245.79, 356,378.82 and 143,520.83 is: 198,058.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,245.79 : 356,378.82 = 143,520.83 : x
  2. Step 2: Convert to fraction form
    258,245.79/356,378.82 = 143,520.83/x
  3. Step 3: Cross multiply
    258,245.79x = 356,378.82 × 143,520.83
  4. Step 4: Simplify right side
    258,245.79x = 51,147,782,258.93
  5. Step 5: Solve for x
    x = 51,147,782,258.93/258,245.79
  6. Step 6: Final answer
    x = 198,058.53

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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.