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Finding the Fourth Proportional to 407,128.49, 610,069.97 and 217,615.83

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Solution

The fourth proportional to 407,128.49, 610,069.97 and 217,615.83 is: 326,090.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,128.49 : 610,069.97 = 217,615.83 : x
  2. Step 2: Convert to fraction form
    407,128.49/610,069.97 = 217,615.83/x
  3. Step 3: Cross multiply
    407,128.49x = 610,069.97 × 217,615.83
  4. Step 4: Simplify right side
    407,128.49x = 132,760,881,135.90
  5. Step 5: Solve for x
    x = 132,760,881,135.90/407,128.49
  6. Step 6: Final answer
    x = 326,090.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.