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Finding the Fourth Proportional to 641,951.70, 885,882.37 and 355,465.63

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Solution

The fourth proportional to 641,951.70, 885,882.37 and 355,465.63 is: 490,536.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,951.70 : 885,882.37 = 355,465.63 : x
  2. Step 2: Convert to fraction form
    641,951.70/885,882.37 = 355,465.63/x
  3. Step 3: Cross multiply
    641,951.70x = 885,882.37 × 355,465.63
  4. Step 4: Simplify right side
    641,951.70x = 314,900,734,757.94
  5. Step 5: Solve for x
    x = 314,900,734,757.94/641,951.70
  6. Step 6: Final answer
    x = 490,536.49

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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.