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Finding the Fourth Proportional to 312,391.62, 431,108.33 and 191,599.50

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Solution

The fourth proportional to 312,391.62, 431,108.33 and 191,599.50 is: 264,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,391.62 : 431,108.33 = 191,599.50 : x
  2. Step 2: Convert to fraction form
    312,391.62/431,108.33 = 191,599.50/x
  3. Step 3: Cross multiply
    312,391.62x = 431,108.33 × 191,599.50
  4. Step 4: Simplify right side
    312,391.62x = 82,600,140,473.84
  5. Step 5: Solve for x
    x = 82,600,140,473.84/312,391.62
  6. Step 6: Final answer
    x = 264,412.15

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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.