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Finding the Fourth Proportional to 311,392.38, 429,722.79 and 175,427.96

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Solution

The fourth proportional to 311,392.38, 429,722.79 and 175,427.96 is: 242,091.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,392.38 : 429,722.79 = 175,427.96 : x
  2. Step 2: Convert to fraction form
    311,392.38/429,722.79 = 175,427.96/x
  3. Step 3: Cross multiply
    311,392.38x = 429,722.79 × 175,427.96
  4. Step 4: Simplify right side
    311,392.38x = 75,385,390,266.59
  5. Step 5: Solve for x
    x = 75,385,390,266.59/311,392.38
  6. Step 6: Final answer
    x = 242,091.31

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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.