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Finding the Fourth Proportional to 321,903.40, 482,855.10 and 238,959.40

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Solution

The fourth proportional to 321,903.40, 482,855.10 and 238,959.40 is: 358,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,903.40 : 482,855.10 = 238,959.40 : x
  2. Step 2: Convert to fraction form
    321,903.40/482,855.10 = 238,959.40/x
  3. Step 3: Cross multiply
    321,903.40x = 482,855.10 × 238,959.40
  4. Step 4: Simplify right side
    321,903.40x = 115,382,764,982.94
  5. Step 5: Solve for x
    x = 115,382,764,982.94/321,903.40
  6. Step 6: Final answer
    x = 358,439.10

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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.