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Finding the Fourth Proportional to 311,438.48, 429,785.06 and 168,198.54

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Solution

The fourth proportional to 311,438.48, 429,785.06 and 168,198.54 is: 232,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,438.48 : 429,785.06 = 168,198.54 : x
  2. Step 2: Convert to fraction form
    311,438.48/429,785.06 = 168,198.54/x
  3. Step 3: Cross multiply
    311,438.48x = 429,785.06 × 168,198.54
  4. Step 4: Simplify right side
    311,438.48x = 72,289,219,605.81
  5. Step 5: Solve for x
    x = 72,289,219,605.81/311,438.48
  6. Step 6: Final answer
    x = 232,113.96

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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.