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Finding the Fourth Proportional to 265,596.80, 398,465.60 and 115,772.80

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Solution

The fourth proportional to 265,596.80, 398,465.60 and 115,772.80 is: 173,689.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,596.80 : 398,465.60 = 115,772.80 : x
  2. Step 2: Convert to fraction form
    265,596.80/398,465.60 = 115,772.80/x
  3. Step 3: Cross multiply
    265,596.80x = 398,465.60 × 115,772.80
  4. Step 4: Simplify right side
    265,596.80x = 46,131,478,215.68
  5. Step 5: Solve for x
    x = 46,131,478,215.68/265,596.80
  6. Step 6: Final answer
    x = 173,689.89

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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.