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Finding the Fourth Proportional to 315,074.80, 472,612.20 and 115,328.80

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Solution

The fourth proportional to 315,074.80, 472,612.20 and 115,328.80 is: 172,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,074.80 : 472,612.20 = 115,328.80 : x
  2. Step 2: Convert to fraction form
    315,074.80/472,612.20 = 115,328.80/x
  3. Step 3: Cross multiply
    315,074.80x = 472,612.20 × 115,328.80
  4. Step 4: Simplify right side
    315,074.80x = 54,505,797,891.36
  5. Step 5: Solve for x
    x = 54,505,797,891.36/315,074.80
  6. Step 6: Final answer
    x = 172,993.20

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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.