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Finding the Fourth Proportional to 641,957.75, 885,890.81 and 355,471.69

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Solution

The fourth proportional to 641,957.75, 885,890.81 and 355,471.69 is: 490,544.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,957.75 : 885,890.81 = 355,471.69 : x
  2. Step 2: Convert to fraction form
    641,957.75/885,890.81 = 355,471.69/x
  3. Step 3: Cross multiply
    641,957.75x = 885,890.81 × 355,471.69
  4. Step 4: Simplify right side
    641,957.75x = 314,909,099,838.42
  5. Step 5: Solve for x
    x = 314,909,099,838.42/641,957.75
  6. Step 6: Final answer
    x = 490,544.90

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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.