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Finding the Fourth Proportional to 309,647.44, 427,347.60 and 173,694.64

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Solution

The fourth proportional to 309,647.44, 427,347.60 and 173,694.64 is: 239,717.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,647.44 : 427,347.60 = 173,694.64 : x
  2. Step 2: Convert to fraction form
    309,647.44/427,347.60 = 173,694.64/x
  3. Step 3: Cross multiply
    309,647.44x = 427,347.60 × 173,694.64
  4. Step 4: Simplify right side
    309,647.44x = 74,227,987,536.86
  5. Step 5: Solve for x
    x = 74,227,987,536.86/309,647.44
  6. Step 6: Final answer
    x = 239,717.75

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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.