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Finding the Fourth Proportional to 378,437.53, 522,217.11 and 208,668.01

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Solution

The fourth proportional to 378,437.53, 522,217.11 and 208,668.01 is: 287,947.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,437.53 : 522,217.11 = 208,668.01 : x
  2. Step 2: Convert to fraction form
    378,437.53/522,217.11 = 208,668.01/x
  3. Step 3: Cross multiply
    378,437.53x = 522,217.11 × 208,668.01
  4. Step 4: Simplify right side
    378,437.53x = 108,970,005,131.65
  5. Step 5: Solve for x
    x = 108,970,005,131.65/378,437.53
  6. Step 6: Final answer
    x = 287,947.14

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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.