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Finding the Fourth Proportional to 427,446.64, 641,903.48 and 379,523.55

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Solution

The fourth proportional to 427,446.64, 641,903.48 and 379,523.55 is: 569,936.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,446.64 : 641,903.48 = 379,523.55 : x
  2. Step 2: Convert to fraction form
    427,446.64/641,903.48 = 379,523.55/x
  3. Step 3: Cross multiply
    427,446.64x = 641,903.48 × 379,523.55
  4. Step 4: Simplify right side
    427,446.64x = 243,617,487,486.95
  5. Step 5: Solve for x
    x = 243,617,487,486.95/427,446.64
  6. Step 6: Final answer
    x = 569,936.61

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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.