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Finding the Fourth Proportional to 641,966, 885,902.18 and 355,479.94

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Solution

The fourth proportional to 641,966, 885,902.18 and 355,479.94 is: 490,556.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,966 : 885,902.18 = 355,479.94 : x
  2. Step 2: Convert to fraction form
    641,966/885,902.18 = 355,479.94/x
  3. Step 3: Cross multiply
    641,966x = 885,902.18 × 355,479.94
  4. Step 4: Simplify right side
    641,966x = 314,920,453,792.27
  5. Step 5: Solve for x
    x = 314,920,453,792.27/641,966
  6. Step 6: Final answer
    x = 490,556.28

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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.