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Finding the Fourth Proportional to 643,723.92, 888,133.71 and 371,755.89

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Solution

The fourth proportional to 643,723.92, 888,133.71 and 371,755.89 is: 512,904.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,723.92 : 888,133.71 = 371,755.89 : x
  2. Step 2: Convert to fraction form
    643,723.92/888,133.71 = 371,755.89/x
  3. Step 3: Cross multiply
    643,723.92x = 888,133.71 × 371,755.89
  4. Step 4: Simplify right side
    643,723.92x = 330,168,937,800.05
  5. Step 5: Solve for x
    x = 330,168,937,800.05/643,723.92
  6. Step 6: Final answer
    x = 512,904.57

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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.