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Finding the Fourth Proportional to 319,679.40, 479,907.90 and 240,169.80

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Solution

The fourth proportional to 319,679.40, 479,907.90 and 240,169.80 is: 360,546.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,679.40 : 479,907.90 = 240,169.80 : x
  2. Step 2: Convert to fraction form
    319,679.40/479,907.90 = 240,169.80/x
  3. Step 3: Cross multiply
    319,679.40x = 479,907.90 × 240,169.80
  4. Step 4: Simplify right side
    319,679.40x = 115,259,384,361.42
  5. Step 5: Solve for x
    x = 115,259,384,361.42/319,679.40
  6. Step 6: Final answer
    x = 360,546.80

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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.