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Finding the Fourth Proportional to 265,613.15, 398,537.06 and 139,223.15

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Solution

The fourth proportional to 265,613.15, 398,537.06 and 139,223.15 is: 208,896.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,613.15 : 398,537.06 = 139,223.15 : x
  2. Step 2: Convert to fraction form
    265,613.15/398,537.06 = 139,223.15/x
  3. Step 3: Cross multiply
    265,613.15x = 398,537.06 × 139,223.15
  4. Step 4: Simplify right side
    265,613.15x = 55,485,582,196.14
  5. Step 5: Solve for x
    x = 55,485,582,196.14/265,613.15
  6. Step 6: Final answer
    x = 208,896.21

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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.