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Finding the Fourth Proportional to 312,270.76, 468,419.09 and 90,654.76

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Solution

The fourth proportional to 312,270.76, 468,419.09 and 90,654.76 is: 135,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,270.76 : 468,419.09 = 90,654.76 : x
  2. Step 2: Convert to fraction form
    312,270.76/468,419.09 = 90,654.76/x
  3. Step 3: Cross multiply
    312,270.76x = 468,419.09 × 90,654.76
  4. Step 4: Simplify right side
    312,270.76x = 42,464,420,183.37
  5. Step 5: Solve for x
    x = 42,464,420,183.37/312,270.76
  6. Step 6: Final answer
    x = 135,985.90

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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.