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Finding the Fourth Proportional to 437,759.40, 656,639.10 and 171,431.40

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Solution

The fourth proportional to 437,759.40, 656,639.10 and 171,431.40 is: 257,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,759.40 : 656,639.10 = 171,431.40 : x
  2. Step 2: Convert to fraction form
    437,759.40/656,639.10 = 171,431.40/x
  3. Step 3: Cross multiply
    437,759.40x = 656,639.10 × 171,431.40
  4. Step 4: Simplify right side
    437,759.40x = 112,568,560,207.74
  5. Step 5: Solve for x
    x = 112,568,560,207.74/437,759.40
  6. Step 6: Final answer
    x = 257,147.10

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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.