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Finding the Fourth Proportional to 262,586.80, 393,977.40 and 104,928.40

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Solution

The fourth proportional to 262,586.80, 393,977.40 and 104,928.40 is: 157,431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,586.80 : 393,977.40 = 104,928.40 : x
  2. Step 2: Convert to fraction form
    262,586.80/393,977.40 = 104,928.40/x
  3. Step 3: Cross multiply
    262,586.80x = 393,977.40 × 104,928.40
  4. Step 4: Simplify right side
    262,586.80x = 41,339,418,218.16
  5. Step 5: Solve for x
    x = 41,339,418,218.16/262,586.80
  6. Step 6: Final answer
    x = 157,431.44

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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.