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Finding the Fourth Proportional to 265,633.90, 398,568.65 and 139,244.00

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Solution

The fourth proportional to 265,633.90, 398,568.65 and 139,244.00 is: 208,927.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,633.90 : 398,568.65 = 139,244.00 : x
  2. Step 2: Convert to fraction form
    265,633.90/398,568.65 = 139,244.00/x
  3. Step 3: Cross multiply
    265,633.90x = 398,568.65 × 139,244.00
  4. Step 4: Simplify right side
    265,633.90x = 55,498,290,411.54
  5. Step 5: Solve for x
    x = 55,498,290,411.54/265,633.90
  6. Step 6: Final answer
    x = 208,927.74

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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.