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Finding the Fourth Proportional to 336,991.20, 505,486.80 and 311,330.40

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Solution

The fourth proportional to 336,991.20, 505,486.80 and 311,330.40 is: 466,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,991.20 : 505,486.80 = 311,330.40 : x
  2. Step 2: Convert to fraction form
    336,991.20/505,486.80 = 311,330.40/x
  3. Step 3: Cross multiply
    336,991.20x = 505,486.80 × 311,330.40
  4. Step 4: Simplify right side
    336,991.20x = 157,373,407,638.72
  5. Step 5: Solve for x
    x = 157,373,407,638.72/336,991.20
  6. Step 6: Final answer
    x = 466,995.60

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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.