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Finding the Fourth Proportional to 485,817.66, 670,183.20 and 324,886.86

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Solution

The fourth proportional to 485,817.66, 670,183.20 and 324,886.86 is: 448,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,817.66 : 670,183.20 = 324,886.86 : x
  2. Step 2: Convert to fraction form
    485,817.66/670,183.20 = 324,886.86/x
  3. Step 3: Cross multiply
    485,817.66x = 670,183.20 × 324,886.86
  4. Step 4: Simplify right side
    485,817.66x = 217,733,715,472.75
  5. Step 5: Solve for x
    x = 217,733,715,472.75/485,817.66
  6. Step 6: Final answer
    x = 448,179.91

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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.