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Finding the Fourth Proportional to 328,673.72, 492,255.06 and 208,721.72

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Solution

The fourth proportional to 328,673.72, 492,255.06 and 208,721.72 is: 312,602.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,673.72 : 492,255.06 = 208,721.72 : x
  2. Step 2: Convert to fraction form
    328,673.72/492,255.06 = 208,721.72/x
  3. Step 3: Cross multiply
    328,673.72x = 492,255.06 × 208,721.72
  4. Step 4: Simplify right side
    328,673.72x = 102,744,322,801.90
  5. Step 5: Solve for x
    x = 102,744,322,801.90/328,673.72
  6. Step 6: Final answer
    x = 312,602.79

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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.