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Finding the Fourth Proportional to 265,763.60, 398,645.40 and 139,230.80

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Solution

The fourth proportional to 265,763.60, 398,645.40 and 139,230.80 is: 208,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,763.60 : 398,645.40 = 139,230.80 : x
  2. Step 2: Convert to fraction form
    265,763.60/398,645.40 = 139,230.80/x
  3. Step 3: Cross multiply
    265,763.60x = 398,645.40 × 139,230.80
  4. Step 4: Simplify right side
    265,763.60x = 55,503,717,958.32
  5. Step 5: Solve for x
    x = 55,503,717,958.32/265,763.60
  6. Step 6: Final answer
    x = 208,846.20

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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.