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Finding the Fourth Proportional to 319,701.40, 479,940.90 and 240,191.80

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Solution

The fourth proportional to 319,701.40, 479,940.90 and 240,191.80 is: 360,579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,701.40 : 479,940.90 = 240,191.80 : x
  2. Step 2: Convert to fraction form
    319,701.40/479,940.90 = 240,191.80/x
  3. Step 3: Cross multiply
    319,701.40x = 479,940.90 × 240,191.80
  4. Step 4: Simplify right side
    319,701.40x = 115,277,868,664.62
  5. Step 5: Solve for x
    x = 115,277,868,664.62/319,701.40
  6. Step 6: Final answer
    x = 360,579.81

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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.