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Finding the Fourth Proportional to 322,356.40, 483,532.08 and 85,715.80

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Solution

The fourth proportional to 322,356.40, 483,532.08 and 85,715.80 is: 128,573.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,356.40 : 483,532.08 = 85,715.80 : x
  2. Step 2: Convert to fraction form
    322,356.40/483,532.08 = 85,715.80/x
  3. Step 3: Cross multiply
    322,356.40x = 483,532.08 × 85,715.80
  4. Step 4: Simplify right side
    322,356.40x = 41,446,339,062.86
  5. Step 5: Solve for x
    x = 41,446,339,062.86/322,356.40
  6. Step 6: Final answer
    x = 128,573.03

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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.