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Finding the Fourth Proportional to 339,278.20, 509,170.02 and 129,326.20

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Solution

The fourth proportional to 339,278.20, 509,170.02 and 129,326.20 is: 194,085.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,278.20 : 509,170.02 = 129,326.20 : x
  2. Step 2: Convert to fraction form
    339,278.20/509,170.02 = 129,326.20/x
  3. Step 3: Cross multiply
    339,278.20x = 509,170.02 × 129,326.20
  4. Step 4: Simplify right side
    339,278.20x = 65,849,023,840.52
  5. Step 5: Solve for x
    x = 65,849,023,840.52/339,278.20
  6. Step 6: Final answer
    x = 194,085.63

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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.