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Finding the Fourth Proportional to 215,907.80, 323,861.70 and 163,419.80

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Solution

The fourth proportional to 215,907.80, 323,861.70 and 163,419.80 is: 245,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,907.80 : 323,861.70 = 163,419.80 : x
  2. Step 2: Convert to fraction form
    215,907.80/323,861.70 = 163,419.80/x
  3. Step 3: Cross multiply
    215,907.80x = 323,861.70 × 163,419.80
  4. Step 4: Simplify right side
    215,907.80x = 52,925,414,241.66
  5. Step 5: Solve for x
    x = 52,925,414,241.66/215,907.80
  6. Step 6: Final answer
    x = 245,129.70

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1.5x scale

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.