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Finding the Fourth Proportional to 321,216.40, 481,824.60 and 171,917.20

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Solution

The fourth proportional to 321,216.40, 481,824.60 and 171,917.20 is: 257,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,216.40 : 481,824.60 = 171,917.20 : x
  2. Step 2: Convert to fraction form
    321,216.40/481,824.60 = 171,917.20/x
  3. Step 3: Cross multiply
    321,216.40x = 481,824.60 × 171,917.20
  4. Step 4: Simplify right side
    321,216.40x = 82,833,936,123.12
  5. Step 5: Solve for x
    x = 82,833,936,123.12/321,216.40
  6. Step 6: Final answer
    x = 257,875.80

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1.5x scale

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.