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Finding the Fourth Proportional to 618,061.80, 927,438.30 and 263,015.40

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Solution

The fourth proportional to 618,061.80, 927,438.30 and 263,015.40 is: 394,670.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,061.80 : 927,438.30 = 263,015.40 : x
  2. Step 2: Convert to fraction form
    618,061.80/927,438.30 = 263,015.40/x
  3. Step 3: Cross multiply
    618,061.80x = 927,438.30 × 263,015.40
  4. Step 4: Simplify right side
    618,061.80x = 243,930,555,449.82
  5. Step 5: Solve for x
    x = 243,930,555,449.82/618,061.80
  6. Step 6: Final answer
    x = 394,670.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.