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Finding the Fourth Proportional to 641,903.39, 885,826.67 and 355,423.49

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Solution

The fourth proportional to 641,903.39, 885,826.67 and 355,423.49 is: 490,484.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,903.39 : 885,826.67 = 355,423.49 : x
  2. Step 2: Convert to fraction form
    641,903.39/885,826.67 = 355,423.49/x
  3. Step 3: Cross multiply
    641,903.39x = 885,826.67 × 355,423.49
  4. Step 4: Simplify right side
    641,903.39x = 314,843,600,380.23
  5. Step 5: Solve for x
    x = 314,843,600,380.23/641,903.39
  6. Step 6: Final answer
    x = 490,484.41

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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.