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Finding the Fourth Proportional to 339,257.20, 508,732.20 and 128,825.20

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Solution

The fourth proportional to 339,257.20, 508,732.20 and 128,825.20 is: 193,179.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,257.20 : 508,732.20 = 128,825.20 : x
  2. Step 2: Convert to fraction form
    339,257.20/508,732.20 = 128,825.20/x
  3. Step 3: Cross multiply
    339,257.20x = 508,732.20 × 128,825.20
  4. Step 4: Simplify right side
    339,257.20x = 65,537,527,411.44
  5. Step 5: Solve for x
    x = 65,537,527,411.44/339,257.20
  6. Step 6: Final answer
    x = 193,179.47

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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.