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Finding the Fourth Proportional to 275,840.70, 380,659.59 and 154,985.10

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Solution

The fourth proportional to 275,840.70, 380,659.59 and 154,985.10 is: 213,879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,840.70 : 380,659.59 = 154,985.10 : x
  2. Step 2: Convert to fraction form
    275,840.70/380,659.59 = 154,985.10/x
  3. Step 3: Cross multiply
    275,840.70x = 380,659.59 × 154,985.10
  4. Step 4: Simplify right side
    275,840.70x = 58,996,564,622.11
  5. Step 5: Solve for x
    x = 58,996,564,622.11/275,840.70
  6. Step 6: Final answer
    x = 213,879.11

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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.