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Finding the Fourth Proportional to 409,725.34, 614,651.32 and 139,790.27

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Solution

The fourth proportional to 409,725.34, 614,651.32 and 139,790.27 is: 209,707.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,725.34 : 614,651.32 = 139,790.27 : x
  2. Step 2: Convert to fraction form
    409,725.34/614,651.32 = 139,790.27/x
  3. Step 3: Cross multiply
    409,725.34x = 614,651.32 × 139,790.27
  4. Step 4: Simplify right side
    409,725.34x = 85,922,273,978.66
  5. Step 5: Solve for x
    x = 85,922,273,978.66/409,725.34
  6. Step 6: Final answer
    x = 209,707.01

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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.