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Finding the Fourth Proportional to 312,087.70, 468,131.55 and 289,969.30

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Solution

The fourth proportional to 312,087.70, 468,131.55 and 289,969.30 is: 434,953.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,087.70 : 468,131.55 = 289,969.30 : x
  2. Step 2: Convert to fraction form
    312,087.70/468,131.55 = 289,969.30/x
  3. Step 3: Cross multiply
    312,087.70x = 468,131.55 × 289,969.30
  4. Step 4: Simplify right side
    312,087.70x = 135,743,777,861.42
  5. Step 5: Solve for x
    x = 135,743,777,861.42/312,087.70
  6. Step 6: Final answer
    x = 434,953.95

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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.