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Finding the Fourth Proportional to 643,722.64, 888,131.76 and 371,754.64

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Solution

The fourth proportional to 643,722.64, 888,131.76 and 371,754.64 is: 512,902.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,722.64 : 888,131.76 = 371,754.64 : x
  2. Step 2: Convert to fraction form
    643,722.64/888,131.76 = 371,754.64/x
  3. Step 3: Cross multiply
    643,722.64x = 888,131.76 × 371,754.64
  4. Step 4: Simplify right side
    643,722.64x = 330,167,102,711.37
  5. Step 5: Solve for x
    x = 330,167,102,711.37/643,722.64
  6. Step 6: Final answer
    x = 512,902.74

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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.