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Finding the Fourth Proportional to 279,140.70, 418,711.05 and 200,408.70

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Solution

The fourth proportional to 279,140.70, 418,711.05 and 200,408.70 is: 300,613.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,140.70 : 418,711.05 = 200,408.70 : x
  2. Step 2: Convert to fraction form
    279,140.70/418,711.05 = 200,408.70/x
  3. Step 3: Cross multiply
    279,140.70x = 418,711.05 × 200,408.70
  4. Step 4: Simplify right side
    279,140.70x = 83,913,337,206.14
  5. Step 5: Solve for x
    x = 83,913,337,206.14/279,140.70
  6. Step 6: Final answer
    x = 300,613.05

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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.