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Finding the Fourth Proportional to 641,658.51, 885,478.03 and 355,172.45

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Solution

The fourth proportional to 641,658.51, 885,478.03 and 355,172.45 is: 490,132.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,658.51 : 885,478.03 = 355,172.45 : x
  2. Step 2: Convert to fraction form
    641,658.51/885,478.03 = 355,172.45/x
  3. Step 3: Cross multiply
    641,658.51x = 885,478.03 × 355,172.45
  4. Step 4: Simplify right side
    641,658.51x = 314,497,396,020.95
  5. Step 5: Solve for x
    x = 314,497,396,020.95/641,658.51
  6. Step 6: Final answer
    x = 490,132.04

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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.