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Finding the Fourth Proportional to 260,931, 391,396.50 and 63,939

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Solution

The fourth proportional to 260,931, 391,396.50 and 63,939 is: 95,908.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,931 : 391,396.50 = 63,939 : x
  2. Step 2: Convert to fraction form
    260,931/391,396.50 = 63,939/x
  3. Step 3: Cross multiply
    260,931x = 391,396.50 × 63,939
  4. Step 4: Simplify right side
    260,931x = 25,025,500,813.50
  5. Step 5: Solve for x
    x = 25,025,500,813.50/260,931
  6. Step 6: Final answer
    x = 95,908.50

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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.