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Finding the Fourth Proportional to 321,528.65, 443,687.91 and 178,283.39

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Solution

The fourth proportional to 321,528.65, 443,687.91 and 178,283.39 is: 246,019.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,528.65 : 443,687.91 = 178,283.39 : x
  2. Step 2: Convert to fraction form
    321,528.65/443,687.91 = 178,283.39/x
  3. Step 3: Cross multiply
    321,528.65x = 443,687.91 × 178,283.39
  4. Step 4: Simplify right side
    321,528.65x = 79,102,184,696.81
  5. Step 5: Solve for x
    x = 79,102,184,696.81/321,528.65
  6. Step 6: Final answer
    x = 246,019.09

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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.