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Finding the Fourth Proportional to 709,687.76, 979,334.97 and 403,735.40

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Solution

The fourth proportional to 709,687.76, 979,334.97 and 403,735.40 is: 557,135.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,687.76 : 979,334.97 = 403,735.40 : x
  2. Step 2: Convert to fraction form
    709,687.76/979,334.97 = 403,735.40/x
  3. Step 3: Cross multiply
    709,687.76x = 979,334.97 × 403,735.40
  4. Step 4: Simplify right side
    709,687.76x = 395,392,195,846.94
  5. Step 5: Solve for x
    x = 395,392,195,846.94/709,687.76
  6. Step 6: Final answer
    x = 557,135.43

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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.