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Finding the Fourth Proportional to 556,956.42, 768,535.83 and 311,906.94

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Solution

The fourth proportional to 556,956.42, 768,535.83 and 311,906.94 is: 430,395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,956.42 : 768,535.83 = 311,906.94 : x
  2. Step 2: Convert to fraction form
    556,956.42/768,535.83 = 311,906.94/x
  3. Step 3: Cross multiply
    556,956.42x = 768,535.83 × 311,906.94
  4. Step 4: Simplify right side
    556,956.42x = 239,711,659,015.66
  5. Step 5: Solve for x
    x = 239,711,659,015.66/556,956.42
  6. Step 6: Final answer
    x = 430,395.72

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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.