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Finding the Fourth Proportional to 386,320.88, 579,183.24 and 146,431.28

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Solution

The fourth proportional to 386,320.88, 579,183.24 and 146,431.28 is: 219,533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,320.88 : 579,183.24 = 146,431.28 : x
  2. Step 2: Convert to fraction form
    386,320.88/579,183.24 = 146,431.28/x
  3. Step 3: Cross multiply
    386,320.88x = 579,183.24 × 146,431.28
  4. Step 4: Simplify right side
    386,320.88x = 84,810,543,187.75
  5. Step 5: Solve for x
    x = 84,810,543,187.75/386,320.88
  6. Step 6: Final answer
    x = 219,533.94

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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.