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Finding the Fourth Proportional to 641,615.93, 885,337.29 and 355,135.33

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Solution

The fourth proportional to 641,615.93, 885,337.29 and 355,135.33 is: 490,035.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,615.93 : 885,337.29 = 355,135.33 : x
  2. Step 2: Convert to fraction form
    641,615.93/885,337.29 = 355,135.33/x
  3. Step 3: Cross multiply
    641,615.93x = 885,337.29 × 355,135.33
  4. Step 4: Simplify right side
    641,615.93x = 314,414,546,218.77
  5. Step 5: Solve for x
    x = 314,414,546,218.77/641,615.93
  6. Step 6: Final answer
    x = 490,035.45

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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.