Home / 315,540.45-438,385.37-311,757.05

Finding the Fourth Proportional to 315,540.45, 438,385.37 and 311,757.05

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Solution

The fourth proportional to 315,540.45, 438,385.37 and 311,757.05 is: 433,129.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,540.45 : 438,385.37 = 311,757.05 : x
  2. Step 2: Convert to fraction form
    315,540.45/438,385.37 = 311,757.05/x
  3. Step 3: Cross multiply
    315,540.45x = 438,385.37 × 311,757.05
  4. Step 4: Simplify right side
    315,540.45x = 136,669,725,963.65
  5. Step 5: Solve for x
    x = 136,669,725,963.65/315,540.45
  6. Step 6: Final answer
    x = 433,129.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.