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Finding the Fourth Proportional to 421,728.15, 631,892.39 and 296,806.71

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Solution

The fourth proportional to 421,728.15, 631,892.39 and 296,806.71 is: 444,717.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,728.15 : 631,892.39 = 296,806.71 : x
  2. Step 2: Convert to fraction form
    421,728.15/631,892.39 = 296,806.71/x
  3. Step 3: Cross multiply
    421,728.15x = 631,892.39 × 296,806.71
  4. Step 4: Simplify right side
    421,728.15x = 187,549,899,865.90
  5. Step 5: Solve for x
    x = 187,549,899,865.90/421,728.15
  6. Step 6: Final answer
    x = 444,717.53

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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.