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Finding the Fourth Proportional to 321,528.90, 443,688.26 and 178,283.64

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Solution

The fourth proportional to 321,528.90, 443,688.26 and 178,283.64 is: 246,019.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,528.90 : 443,688.26 = 178,283.64 : x
  2. Step 2: Convert to fraction form
    321,528.90/443,688.26 = 178,283.64/x
  3. Step 3: Cross multiply
    321,528.90x = 443,688.26 × 178,283.64
  4. Step 4: Simplify right side
    321,528.90x = 79,102,357,126.65
  5. Step 5: Solve for x
    x = 79,102,357,126.65/321,528.90
  6. Step 6: Final answer
    x = 246,019.43

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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.