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Finding the Fourth Proportional to 306,002.70, 459,004.05 and 128,709.90

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Solution

The fourth proportional to 306,002.70, 459,004.05 and 128,709.90 is: 193,064.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,002.70 : 459,004.05 = 128,709.90 : x
  2. Step 2: Convert to fraction form
    306,002.70/459,004.05 = 128,709.90/x
  3. Step 3: Cross multiply
    306,002.70x = 459,004.05 × 128,709.90
  4. Step 4: Simplify right side
    306,002.70x = 59,078,365,375.10
  5. Step 5: Solve for x
    x = 59,078,365,375.10/306,002.70
  6. Step 6: Final answer
    x = 193,064.85

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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.