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Finding the Fourth Proportional to 265,899.69, 398,788.71 and 76,358.55

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Solution

The fourth proportional to 265,899.69, 398,788.71 and 76,358.55 is: 114,520.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,899.69 : 398,788.71 = 76,358.55 : x
  2. Step 2: Convert to fraction form
    265,899.69/398,788.71 = 76,358.55/x
  3. Step 3: Cross multiply
    265,899.69x = 398,788.71 × 76,358.55
  4. Step 4: Simplify right side
    265,899.69x = 30,450,927,651.97
  5. Step 5: Solve for x
    x = 30,450,927,651.97/265,899.69
  6. Step 6: Final answer
    x = 114,520.36

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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.