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Finding the Fourth Proportional to 311,690.72, 430,133.26 and 177,554.72

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Solution

The fourth proportional to 311,690.72, 430,133.26 and 177,554.72 is: 245,025.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,690.72 : 430,133.26 = 177,554.72 : x
  2. Step 2: Convert to fraction form
    311,690.72/430,133.26 = 177,554.72/x
  3. Step 3: Cross multiply
    311,690.72x = 430,133.26 × 177,554.72
  4. Step 4: Simplify right side
    311,690.72x = 76,372,190,541.99
  5. Step 5: Solve for x
    x = 76,372,190,541.99/311,690.72
  6. Step 6: Final answer
    x = 245,025.55

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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.