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Finding the Fourth Proportional to 421,215.56, 631,934.13 and 151,370.96

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Solution

The fourth proportional to 421,215.56, 631,934.13 and 151,370.96 is: 227,096.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,215.56 : 631,934.13 = 151,370.96 : x
  2. Step 2: Convert to fraction form
    421,215.56/631,934.13 = 151,370.96/x
  3. Step 3: Cross multiply
    421,215.56x = 631,934.13 × 151,370.96
  4. Step 4: Simplify right side
    421,215.56x = 95,656,475,914.86
  5. Step 5: Solve for x
    x = 95,656,475,914.86/421,215.56
  6. Step 6: Final answer
    x = 227,096.25

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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.