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Finding the Fourth Proportional to 240,390, 331,698.60 and 132,939

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Solution

The fourth proportional to 240,390, 331,698.60 and 132,939 is: 183,433.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,390 : 331,698.60 = 132,939 : x
  2. Step 2: Convert to fraction form
    240,390/331,698.60 = 132,939/x
  3. Step 3: Cross multiply
    240,390x = 331,698.60 × 132,939
  4. Step 4: Simplify right side
    240,390x = 44,095,680,185.40
  5. Step 5: Solve for x
    x = 44,095,680,185.40/240,390
  6. Step 6: Final answer
    x = 183,433.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.