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Finding the Fourth Proportional to 258,408.82, 356,509.69 and 156,397.21

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Solution

The fourth proportional to 258,408.82, 356,509.69 and 156,397.21 is: 215,770.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,408.82 : 356,509.69 = 156,397.21 : x
  2. Step 2: Convert to fraction form
    258,408.82/356,509.69 = 156,397.21/x
  3. Step 3: Cross multiply
    258,408.82x = 356,509.69 × 156,397.21
  4. Step 4: Simplify right side
    258,408.82x = 55,757,120,853.96
  5. Step 5: Solve for x
    x = 55,757,120,853.96/258,408.82
  6. Step 6: Final answer
    x = 215,770.97

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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.