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Finding the Fourth Proportional to 351,656.68, 485,321.70 and 208,440.04

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Solution

The fourth proportional to 351,656.68, 485,321.70 and 208,440.04 is: 287,668.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,656.68 : 485,321.70 = 208,440.04 : x
  2. Step 2: Convert to fraction form
    351,656.68/485,321.70 = 208,440.04/x
  3. Step 3: Cross multiply
    351,656.68x = 485,321.70 × 208,440.04
  4. Step 4: Simplify right side
    351,656.68x = 101,160,474,560.87
  5. Step 5: Solve for x
    x = 101,160,474,560.87/351,656.68
  6. Step 6: Final answer
    x = 287,668.29

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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.