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Finding the Fourth Proportional to 297,257.89, 445,887.14 and 139,486.49

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Solution

The fourth proportional to 297,257.89, 445,887.14 and 139,486.49 is: 209,229.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,257.89 : 445,887.14 = 139,486.49 : x
  2. Step 2: Convert to fraction form
    297,257.89/445,887.14 = 139,486.49/x
  3. Step 3: Cross multiply
    297,257.89x = 445,887.14 × 139,486.49
  4. Step 4: Simplify right side
    297,257.89x = 62,195,232,512.02
  5. Step 5: Solve for x
    x = 62,195,232,512.02/297,257.89
  6. Step 6: Final answer
    x = 209,229.88

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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.