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Finding the Fourth Proportional to 421,481.70, 632,003.85 and 155,105.10

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Solution

The fourth proportional to 421,481.70, 632,003.85 and 155,105.10 is: 232,577.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,481.70 : 632,003.85 = 155,105.10 : x
  2. Step 2: Convert to fraction form
    421,481.70/632,003.85 = 155,105.10/x
  3. Step 3: Cross multiply
    421,481.70x = 632,003.85 × 155,105.10
  4. Step 4: Simplify right side
    421,481.70x = 98,027,020,354.64
  5. Step 5: Solve for x
    x = 98,027,020,354.64/421,481.70
  6. Step 6: Final answer
    x = 232,577.17

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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.