Home / 320,419.10-479,972.55-162,736.40

Finding the Fourth Proportional to 320,419.10, 479,972.55 and 162,736.40

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Solution

The fourth proportional to 320,419.10, 479,972.55 and 162,736.40 is: 243,771.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,419.10 : 479,972.55 = 162,736.40 : x
  2. Step 2: Convert to fraction form
    320,419.10/479,972.55 = 162,736.40/x
  3. Step 3: Cross multiply
    320,419.10x = 479,972.55 × 162,736.40
  4. Step 4: Simplify right side
    320,419.10x = 78,109,004,885.82
  5. Step 5: Solve for x
    x = 78,109,004,885.82/320,419.10
  6. Step 6: Final answer
    x = 243,771.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.