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Finding the Fourth Proportional to 421,099.28, 631,408.79 and 250,393.04

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Solution

The fourth proportional to 421,099.28, 631,408.79 and 250,393.04 is: 375,446.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,099.28 : 631,408.79 = 250,393.04 : x
  2. Step 2: Convert to fraction form
    421,099.28/631,408.79 = 250,393.04/x
  3. Step 3: Cross multiply
    421,099.28x = 631,408.79 × 250,393.04
  4. Step 4: Simplify right side
    421,099.28x = 158,100,366,410.82
  5. Step 5: Solve for x
    x = 158,100,366,410.82/421,099.28
  6. Step 6: Final answer
    x = 375,446.77

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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.