Home / 320,972.88-443,403.96-256,357.28

Finding the Fourth Proportional to 320,972.88, 443,403.96 and 256,357.28

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Solution

The fourth proportional to 320,972.88, 443,403.96 and 256,357.28 is: 354,141.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,972.88 : 443,403.96 = 256,357.28 : x
  2. Step 2: Convert to fraction form
    320,972.88/443,403.96 = 256,357.28/x
  3. Step 3: Cross multiply
    320,972.88x = 443,403.96 × 256,357.28
  4. Step 4: Simplify right side
    320,972.88x = 113,669,833,126.83
  5. Step 5: Solve for x
    x = 113,669,833,126.83/320,972.88
  6. Step 6: Final answer
    x = 354,141.55

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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.