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Finding the Fourth Proportional to 311,391.42, 429,751.91 and 190,612.52

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Solution

The fourth proportional to 311,391.42, 429,751.91 and 190,612.52 is: 263,064.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,391.42 : 429,751.91 = 190,612.52 : x
  2. Step 2: Convert to fraction form
    311,391.42/429,751.91 = 190,612.52/x
  3. Step 3: Cross multiply
    311,391.42x = 429,751.91 × 190,612.52
  4. Step 4: Simplify right side
    311,391.42x = 81,916,094,661.23
  5. Step 5: Solve for x
    x = 81,916,094,661.23/311,391.42
  6. Step 6: Final answer
    x = 263,064.71

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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.