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Finding the Fourth Proportional to 545,687.40, 818,620.70 and 171,620.20

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Solution

The fourth proportional to 545,687.40, 818,620.70 and 171,620.20 is: 257,458.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,687.40 : 818,620.70 = 171,620.20 : x
  2. Step 2: Convert to fraction form
    545,687.40/818,620.70 = 171,620.20/x
  3. Step 3: Cross multiply
    545,687.40x = 818,620.70 × 171,620.20
  4. Step 4: Simplify right side
    545,687.40x = 140,491,848,258.14
  5. Step 5: Solve for x
    x = 140,491,848,258.14/545,687.40
  6. Step 6: Final answer
    x = 257,458.48

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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.