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Finding the Fourth Proportional to 217,499.90, 305,199.70 and 217,499.90

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Solution

The fourth proportional to 217,499.90, 305,199.70 and 217,499.90 is: 305,199.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,499.90 : 305,199.70 = 217,499.90 : x
  2. Step 2: Convert to fraction form
    217,499.90/305,199.70 = 217,499.90/x
  3. Step 3: Cross multiply
    217,499.90x = 305,199.70 × 217,499.90
  4. Step 4: Simplify right side
    217,499.90x = 66,380,904,230.03
  5. Step 5: Solve for x
    x = 66,380,904,230.03/217,499.90
  6. Step 6: Final answer
    x = 305,199.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.