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Finding the Fourth Proportional to 315,375.40, 435,274.47 and 188,059.20

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Solution

The fourth proportional to 315,375.40, 435,274.47 and 188,059.20 is: 259,555.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,375.40 : 435,274.47 = 188,059.20 : x
  2. Step 2: Convert to fraction form
    315,375.40/435,274.47 = 188,059.20/x
  3. Step 3: Cross multiply
    315,375.40x = 435,274.47 × 188,059.20
  4. Step 4: Simplify right side
    315,375.40x = 81,857,368,608.62
  5. Step 5: Solve for x
    x = 81,857,368,608.62/315,375.40
  6. Step 6: Final answer
    x = 259,555.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.