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Finding the Fourth Proportional to 311,909.70, 467,864.55 and 278,667.30

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Solution

The fourth proportional to 311,909.70, 467,864.55 and 278,667.30 is: 418,000.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,909.70 : 467,864.55 = 278,667.30 : x
  2. Step 2: Convert to fraction form
    311,909.70/467,864.55 = 278,667.30/x
  3. Step 3: Cross multiply
    311,909.70x = 467,864.55 × 278,667.30
  4. Step 4: Simplify right side
    311,909.70x = 130,378,550,914.22
  5. Step 5: Solve for x
    x = 130,378,550,914.22/311,909.70
  6. Step 6: Final answer
    x = 418,000.95

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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.