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Finding the Fourth Proportional to 311,579.70, 429,476.28 and 243,478.34

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Solution

The fourth proportional to 311,579.70, 429,476.28 and 243,478.34 is: 335,606.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,579.70 : 429,476.28 = 243,478.34 : x
  2. Step 2: Convert to fraction form
    311,579.70/429,476.28 = 243,478.34/x
  3. Step 3: Cross multiply
    311,579.70x = 429,476.28 × 243,478.34
  4. Step 4: Simplify right side
    311,579.70x = 104,568,171,723.78
  5. Step 5: Solve for x
    x = 104,568,171,723.78/311,579.70
  6. Step 6: Final answer
    x = 335,606.50

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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.