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Finding the Fourth Proportional to 321,606.15, 482,432.45 and 84,945.75

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Solution

The fourth proportional to 321,606.15, 482,432.45 and 84,945.75 is: 127,424.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,606.15 : 482,432.45 = 84,945.75 : x
  2. Step 2: Convert to fraction form
    321,606.15/482,432.45 = 84,945.75/x
  3. Step 3: Cross multiply
    321,606.15x = 482,432.45 × 84,945.75
  4. Step 4: Simplify right side
    321,606.15x = 40,980,586,289.59
  5. Step 5: Solve for x
    x = 40,980,586,289.59/321,606.15
  6. Step 6: Final answer
    x = 127,424.76

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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.