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Finding the Fourth Proportional to 265,717.73, 398,806.86 and 139,447.19

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Solution

The fourth proportional to 265,717.73, 398,806.86 and 139,447.19 is: 209,291.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,717.73 : 398,806.86 = 139,447.19 : x
  2. Step 2: Convert to fraction form
    265,717.73/398,806.86 = 139,447.19/x
  3. Step 3: Cross multiply
    265,717.73x = 398,806.86 × 139,447.19
  4. Step 4: Simplify right side
    265,717.73x = 55,612,495,979.72
  5. Step 5: Solve for x
    x = 55,612,495,979.72/265,717.73
  6. Step 6: Final answer
    x = 209,291.63

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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.