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Finding the Fourth Proportional to 388,978.20, 583,467.30 and 365,358.60

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Solution

The fourth proportional to 388,978.20, 583,467.30 and 365,358.60 is: 548,037.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,978.20 : 583,467.30 = 365,358.60 : x
  2. Step 2: Convert to fraction form
    388,978.20/583,467.30 = 365,358.60/x
  3. Step 3: Cross multiply
    388,978.20x = 583,467.30 × 365,358.60
  4. Step 4: Simplify right side
    388,978.20x = 213,174,795,873.78
  5. Step 5: Solve for x
    x = 213,174,795,873.78/388,978.20
  6. Step 6: Final answer
    x = 548,037.90

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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.