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Finding the Fourth Proportional to 265,718.73, 398,808.36 and 139,448.19

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Solution

The fourth proportional to 265,718.73, 398,808.36 and 139,448.19 is: 209,293.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,718.73 : 398,808.36 = 139,448.19 : x
  2. Step 2: Convert to fraction form
    265,718.73/398,808.36 = 139,448.19/x
  3. Step 3: Cross multiply
    265,718.73x = 398,808.36 × 139,448.19
  4. Step 4: Simplify right side
    265,718.73x = 55,613,103,958.87
  5. Step 5: Solve for x
    x = 55,613,103,958.87/265,718.73
  6. Step 6: Final answer
    x = 209,293.13

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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.