Home / 320,971.88-443,402.58-256,356.28

Finding the Fourth Proportional to 320,971.88, 443,402.58 and 256,356.28

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Solution

The fourth proportional to 320,971.88, 443,402.58 and 256,356.28 is: 354,140.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,971.88 : 443,402.58 = 256,356.28 : x
  2. Step 2: Convert to fraction form
    320,971.88/443,402.58 = 256,356.28/x
  3. Step 3: Cross multiply
    320,971.88x = 443,402.58 × 256,356.28
  4. Step 4: Simplify right side
    320,971.88x = 113,669,035,951.20
  5. Step 5: Solve for x
    x = 113,669,035,951.20/320,971.88
  6. Step 6: Final answer
    x = 354,140.17

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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.