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Finding the Fourth Proportional to 215,810.70, 323,716.05 and 165,986.70

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Solution

The fourth proportional to 215,810.70, 323,716.05 and 165,986.70 is: 248,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,810.70 : 323,716.05 = 165,986.70 : x
  2. Step 2: Convert to fraction form
    215,810.70/323,716.05 = 165,986.70/x
  3. Step 3: Cross multiply
    215,810.70x = 323,716.05 × 165,986.70
  4. Step 4: Simplify right side
    215,810.70x = 53,732,558,876.54
  5. Step 5: Solve for x
    x = 53,732,558,876.54/215,810.70
  6. Step 6: Final answer
    x = 248,980.05

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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.