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Finding the Fourth Proportional to 311,396.40, 429,768.72 and 175,456.80

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Solution

The fourth proportional to 311,396.40, 429,768.72 and 175,456.80 is: 242,153.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,396.40 : 429,768.72 = 175,456.80 : x
  2. Step 2: Convert to fraction form
    311,396.40/429,768.72 = 175,456.80/x
  3. Step 3: Cross multiply
    311,396.40x = 429,768.72 × 175,456.80
  4. Step 4: Simplify right side
    311,396.40x = 75,405,844,351.30
  5. Step 5: Solve for x
    x = 75,405,844,351.30/311,396.40
  6. Step 6: Final answer
    x = 242,153.87

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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.