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Finding the Fourth Proportional to 311,905.60, 467,858.40 and 279,246.40

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Solution

The fourth proportional to 311,905.60, 467,858.40 and 279,246.40 is: 418,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,905.60 : 467,858.40 = 279,246.40 : x
  2. Step 2: Convert to fraction form
    311,905.60/467,858.40 = 279,246.40/x
  3. Step 3: Cross multiply
    311,905.60x = 467,858.40 × 279,246.40
  4. Step 4: Simplify right side
    311,905.60x = 130,647,773,909.76
  5. Step 5: Solve for x
    x = 130,647,773,909.76/311,905.60
  6. Step 6: Final answer
    x = 418,869.60

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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.