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Finding the Fourth Proportional to 311,389.35, 429,628.39 and 175,375.71

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Solution

The fourth proportional to 311,389.35, 429,628.39 and 175,375.71 is: 241,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,389.35 : 429,628.39 = 175,375.71 : x
  2. Step 2: Convert to fraction form
    311,389.35/429,628.39 = 175,375.71/x
  3. Step 3: Cross multiply
    311,389.35x = 429,628.39 × 175,375.71
  4. Step 4: Simplify right side
    311,389.35x = 75,346,383,932.41
  5. Step 5: Solve for x
    x = 75,346,383,932.41/311,389.35
  6. Step 6: Final answer
    x = 241,968.40

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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.