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Finding the Fourth Proportional to 265,633.53, 398,568.07 and 139,243.61

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Solution

The fourth proportional to 265,633.53, 398,568.07 and 139,243.61 is: 208,927.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,633.53 : 398,568.07 = 139,243.61 : x
  2. Step 2: Convert to fraction form
    265,633.53/398,568.07 = 139,243.61/x
  3. Step 3: Cross multiply
    265,633.53x = 398,568.07 × 139,243.61
  4. Step 4: Simplify right side
    265,633.53x = 55,498,056,573.38
  5. Step 5: Solve for x
    x = 55,498,056,573.38/265,633.53
  6. Step 6: Final answer
    x = 208,927.15

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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.