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Finding the Fourth Proportional to 680,861.66, 939,446.70 and 394,364.66

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Solution

The fourth proportional to 680,861.66, 939,446.70 and 394,364.66 is: 544,140.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,861.66 : 939,446.70 = 394,364.66 : x
  2. Step 2: Convert to fraction form
    680,861.66/939,446.70 = 394,364.66/x
  3. Step 3: Cross multiply
    680,861.66x = 939,446.70 × 394,364.66
  4. Step 4: Simplify right side
    680,861.66x = 370,484,578,433.62
  5. Step 5: Solve for x
    x = 370,484,578,433.62/680,861.66
  6. Step 6: Final answer
    x = 544,140.76

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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.