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Finding the Fourth Proportional to 311,618.48, 430,759.96 and 277,960.55

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Solution

The fourth proportional to 311,618.48, 430,759.96 and 277,960.55 is: 384,233.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,618.48 : 430,759.96 = 277,960.55 : x
  2. Step 2: Convert to fraction form
    311,618.48/430,759.96 = 277,960.55/x
  3. Step 3: Cross multiply
    311,618.48x = 430,759.96 × 277,960.55
  4. Step 4: Simplify right side
    311,618.48x = 119,734,272,550.88
  5. Step 5: Solve for x
    x = 119,734,272,550.88/311,618.48
  6. Step 6: Final answer
    x = 384,233.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.