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Finding the Fourth Proportional to 358,813.65, 538,221.24 and 336,891.72

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Solution

The fourth proportional to 358,813.65, 538,221.24 and 336,891.72 is: 505,338.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,813.65 : 538,221.24 = 336,891.72 : x
  2. Step 2: Convert to fraction form
    358,813.65/538,221.24 = 336,891.72/x
  3. Step 3: Cross multiply
    358,813.65x = 538,221.24 × 336,891.72
  4. Step 4: Simplify right side
    358,813.65x = 181,322,279,284.13
  5. Step 5: Solve for x
    x = 181,322,279,284.13/358,813.65
  6. Step 6: Final answer
    x = 505,338.30

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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.