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Finding the Fourth Proportional to 666,360.85, 999,524.67 and 311,771.61

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Solution

The fourth proportional to 666,360.85, 999,524.67 and 311,771.61 is: 467,649.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,360.85 : 999,524.67 = 311,771.61 : x
  2. Step 2: Convert to fraction form
    666,360.85/999,524.67 = 311,771.61/x
  3. Step 3: Cross multiply
    666,360.85x = 999,524.67 × 311,771.61
  4. Step 4: Simplify right side
    666,360.85x = 311,623,415,600.62
  5. Step 5: Solve for x
    x = 311,623,415,600.62/666,360.85
  6. Step 6: Final answer
    x = 467,649.65

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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.