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Finding the Fourth Proportional to 618,022.56, 926,813.52 and 280,780.68

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Solution

The fourth proportional to 618,022.56, 926,813.52 and 280,780.68 is: 421,070.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,022.56 : 926,813.52 = 280,780.68 : x
  2. Step 2: Convert to fraction form
    618,022.56/926,813.52 = 280,780.68/x
  3. Step 3: Cross multiply
    618,022.56x = 926,813.52 × 280,780.68
  4. Step 4: Simplify right side
    618,022.56x = 260,231,330,378.79
  5. Step 5: Solve for x
    x = 260,231,330,378.79/618,022.56
  6. Step 6: Final answer
    x = 421,070.92

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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.