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Finding the Fourth Proportional to 321,439.32, 482,191.38 and 84,798.36

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Solution

The fourth proportional to 321,439.32, 482,191.38 and 84,798.36 is: 127,206.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,439.32 : 482,191.38 = 84,798.36 : x
  2. Step 2: Convert to fraction form
    321,439.32/482,191.38 = 84,798.36/x
  3. Step 3: Cross multiply
    321,439.32x = 482,191.38 × 84,798.36
  4. Step 4: Simplify right side
    321,439.32x = 40,889,038,230.14
  5. Step 5: Solve for x
    x = 40,889,038,230.14/321,439.32
  6. Step 6: Final answer
    x = 127,206.09

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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.