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Finding the Fourth Proportional to 311,859.40, 430,267.72 and 190,874.56

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Solution

The fourth proportional to 311,859.40, 430,267.72 and 190,874.56 is: 263,346.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,859.40 : 430,267.72 = 190,874.56 : x
  2. Step 2: Convert to fraction form
    311,859.40/430,267.72 = 190,874.56/x
  3. Step 3: Cross multiply
    311,859.40x = 430,267.72 × 190,874.56
  4. Step 4: Simplify right side
    311,859.40x = 82,127,161,737.20
  5. Step 5: Solve for x
    x = 82,127,161,737.20/311,859.40
  6. Step 6: Final answer
    x = 263,346.76

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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.