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Finding the Fourth Proportional to 265,558.45, 398,455.39 and 139,168.64

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Solution

The fourth proportional to 265,558.45, 398,455.39 and 139,168.64 is: 208,814.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,558.45 : 398,455.39 = 139,168.64 : x
  2. Step 2: Convert to fraction form
    265,558.45/398,455.39 = 139,168.64/x
  3. Step 3: Cross multiply
    265,558.45x = 398,455.39 × 139,168.64
  4. Step 4: Simplify right side
    265,558.45x = 55,452,492,734.69
  5. Step 5: Solve for x
    x = 55,452,492,734.69/265,558.45
  6. Step 6: Final answer
    x = 208,814.65

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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.