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Finding the Fourth Proportional to 388,974.64, 583,410.12 and 108,520.24

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Solution

The fourth proportional to 388,974.64, 583,410.12 and 108,520.24 is: 162,765.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,974.64 : 583,410.12 = 108,520.24 : x
  2. Step 2: Convert to fraction form
    388,974.64/583,410.12 = 108,520.24/x
  3. Step 3: Cross multiply
    388,974.64x = 583,410.12 × 108,520.24
  4. Step 4: Simplify right side
    388,974.64x = 63,311,806,240.83
  5. Step 5: Solve for x
    x = 63,311,806,240.83/388,974.64
  6. Step 6: Final answer
    x = 162,765.90

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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.