Home / 309,629.40-427,293-231,967.44

Finding the Fourth Proportional to 309,629.40, 427,293 and 231,967.44

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Solution

The fourth proportional to 309,629.40, 427,293 and 231,967.44 is: 320,118.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,629.40 : 427,293 = 231,967.44 : x
  2. Step 2: Convert to fraction form
    309,629.40/427,293 = 231,967.44/x
  3. Step 3: Cross multiply
    309,629.40x = 427,293 × 231,967.44
  4. Step 4: Simplify right side
    309,629.40x = 99,118,063,339.92
  5. Step 5: Solve for x
    x = 99,118,063,339.92/309,629.40
  6. Step 6: Final answer
    x = 320,118.38

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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.