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Finding the Fourth Proportional to 481,910.16, 664,955.28 and 321,005.28

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Solution

The fourth proportional to 481,910.16, 664,955.28 and 321,005.28 is: 442,933.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,910.16 : 664,955.28 = 321,005.28 : x
  2. Step 2: Convert to fraction form
    481,910.16/664,955.28 = 321,005.28/x
  3. Step 3: Cross multiply
    481,910.16x = 664,955.28 × 321,005.28
  4. Step 4: Simplify right side
    481,910.16x = 213,454,155,843.88
  5. Step 5: Solve for x
    x = 213,454,155,843.88/481,910.16
  6. Step 6: Final answer
    x = 442,933.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.