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Finding the Fourth Proportional to 321,639.66, 443,824.65 and 178,364.70

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Solution

The fourth proportional to 321,639.66, 443,824.65 and 178,364.70 is: 246,122.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,639.66 : 443,824.65 = 178,364.70 : x
  2. Step 2: Convert to fraction form
    321,639.66/443,824.65 = 178,364.70/x
  3. Step 3: Cross multiply
    321,639.66x = 443,824.65 × 178,364.70
  4. Step 4: Simplify right side
    321,639.66x = 79,162,650,549.86
  5. Step 5: Solve for x
    x = 79,162,650,549.86/321,639.66
  6. Step 6: Final answer
    x = 246,122.17

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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.