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Finding the Fourth Proportional to 641,712.78, 885,563.89 and 351,343.16

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Solution

The fourth proportional to 641,712.78, 885,563.89 and 351,343.16 is: 484,853.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,712.78 : 885,563.89 = 351,343.16 : x
  2. Step 2: Convert to fraction form
    641,712.78/885,563.89 = 351,343.16/x
  3. Step 3: Cross multiply
    641,712.78x = 885,563.89 × 351,343.16
  4. Step 4: Simplify right side
    641,712.78x = 311,136,815,494.49
  5. Step 5: Solve for x
    x = 311,136,815,494.49/641,712.78
  6. Step 6: Final answer
    x = 484,853.70

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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.