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Finding the Fourth Proportional to 309,512.67, 427,138.19 and 173,548.25

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Solution

The fourth proportional to 309,512.67, 427,138.19 and 173,548.25 is: 239,502.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,512.67 : 427,138.19 = 173,548.25 : x
  2. Step 2: Convert to fraction form
    309,512.67/427,138.19 = 173,548.25/x
  3. Step 3: Cross multiply
    309,512.67x = 427,138.19 × 173,548.25
  4. Step 4: Simplify right side
    309,512.67x = 74,129,082,942.38
  5. Step 5: Solve for x
    x = 74,129,082,942.38/309,512.67
  6. Step 6: Final answer
    x = 239,502.58

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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.