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Finding the Fourth Proportional to 311,817.40, 467,034.90 and 187,401.40

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Solution

The fourth proportional to 311,817.40, 467,034.90 and 187,401.40 is: 280,686.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,817.40 : 467,034.90 = 187,401.40 : x
  2. Step 2: Convert to fraction form
    311,817.40/467,034.90 = 187,401.40/x
  3. Step 3: Cross multiply
    311,817.40x = 467,034.90 × 187,401.40
  4. Step 4: Simplify right side
    311,817.40x = 87,522,994,108.86
  5. Step 5: Solve for x
    x = 87,522,994,108.86/311,817.40
  6. Step 6: Final answer
    x = 280,686.69

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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.