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Finding the Fourth Proportional to 388,940.30, 583,508.86 and 108,457.56

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Solution

The fourth proportional to 388,940.30, 583,508.86 and 108,457.56 is: 162,713.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,940.30 : 583,508.86 = 108,457.56 : x
  2. Step 2: Convert to fraction form
    388,940.30/583,508.86 = 108,457.56/x
  3. Step 3: Cross multiply
    388,940.30x = 583,508.86 × 108,457.56
  4. Step 4: Simplify right side
    388,940.30x = 63,285,947,193.98
  5. Step 5: Solve for x
    x = 63,285,947,193.98/388,940.30
  6. Step 6: Final answer
    x = 162,713.78

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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.