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Finding the Fourth Proportional to 702,781.28, 969,836.76 and 380,491.56

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Solution

The fourth proportional to 702,781.28, 969,836.76 and 380,491.56 is: 525,077.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,781.28 : 969,836.76 = 380,491.56 : x
  2. Step 2: Convert to fraction form
    702,781.28/969,836.76 = 380,491.56/x
  3. Step 3: Cross multiply
    702,781.28x = 969,836.76 × 380,491.56
  4. Step 4: Simplify right side
    702,781.28x = 369,014,701,757.75
  5. Step 5: Solve for x
    x = 369,014,701,757.75/702,781.28
  6. Step 6: Final answer
    x = 525,077.59

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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.