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Finding the Fourth Proportional to 406,663.28, 610,076.48 and 140,433.60

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Solution

The fourth proportional to 406,663.28, 610,076.48 and 140,433.60 is: 210,678.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,663.28 : 610,076.48 = 140,433.60 : x
  2. Step 2: Convert to fraction form
    406,663.28/610,076.48 = 140,433.60/x
  3. Step 3: Cross multiply
    406,663.28x = 610,076.48 × 140,433.60
  4. Step 4: Simplify right side
    406,663.28x = 85,675,236,361.73
  5. Step 5: Solve for x
    x = 85,675,236,361.73/406,663.28
  6. Step 6: Final answer
    x = 210,678.57

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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.