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Finding the Fourth Proportional to 279,485.40, 419,228.10 and 271,709.40

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Solution

The fourth proportional to 279,485.40, 419,228.10 and 271,709.40 is: 407,564.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,485.40 : 419,228.10 = 271,709.40 : x
  2. Step 2: Convert to fraction form
    279,485.40/419,228.10 = 271,709.40/x
  3. Step 3: Cross multiply
    279,485.40x = 419,228.10 × 271,709.40
  4. Step 4: Simplify right side
    279,485.40x = 113,908,215,514.14
  5. Step 5: Solve for x
    x = 113,908,215,514.14/279,485.40
  6. Step 6: Final answer
    x = 407,564.10

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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.