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Finding the Fourth Proportional to 319,874.46, 479,879.34 and 120,196.57

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Solution

The fourth proportional to 319,874.46, 479,879.34 and 120,196.57 is: 180,320.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,874.46 : 479,879.34 = 120,196.57 : x
  2. Step 2: Convert to fraction form
    319,874.46/479,879.34 = 120,196.57/x
  3. Step 3: Cross multiply
    319,874.46x = 479,879.34 × 120,196.57
  4. Step 4: Simplify right side
    319,874.46x = 57,679,849,932.90
  5. Step 5: Solve for x
    x = 57,679,849,932.90/319,874.46
  6. Step 6: Final answer
    x = 180,320.28

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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.