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Finding the Fourth Proportional to 328,668.72, 492,247.56 and 208,716.72

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Solution

The fourth proportional to 328,668.72, 492,247.56 and 208,716.72 is: 312,595.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,668.72 : 492,247.56 = 208,716.72 : x
  2. Step 2: Convert to fraction form
    328,668.72/492,247.56 = 208,716.72/x
  3. Step 3: Cross multiply
    328,668.72x = 492,247.56 × 208,716.72
  4. Step 4: Simplify right side
    328,668.72x = 102,740,296,151.20
  5. Step 5: Solve for x
    x = 102,740,296,151.20/328,668.72
  6. Step 6: Final answer
    x = 312,595.30

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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.