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Finding the Fourth Proportional to 257,428.80, 385,912.80 and 99,604.80

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Solution

The fourth proportional to 257,428.80, 385,912.80 and 99,604.80 is: 149,318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,428.80 : 385,912.80 = 99,604.80 : x
  2. Step 2: Convert to fraction form
    257,428.80/385,912.80 = 99,604.80/x
  3. Step 3: Cross multiply
    257,428.80x = 385,912.80 × 99,604.80
  4. Step 4: Simplify right side
    257,428.80x = 38,438,767,261.44
  5. Step 5: Solve for x
    x = 38,438,767,261.44/257,428.80
  6. Step 6: Final answer
    x = 149,318.05

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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.