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Finding the Fourth Proportional to 324,621.60, 487,078.20 and 147,037.20

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Solution

The fourth proportional to 324,621.60, 487,078.20 and 147,037.20 is: 220,621.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,621.60 : 487,078.20 = 147,037.20 : x
  2. Step 2: Convert to fraction form
    324,621.60/487,078.20 = 147,037.20/x
  3. Step 3: Cross multiply
    324,621.60x = 487,078.20 × 147,037.20
  4. Step 4: Simplify right side
    324,621.60x = 71,618,614,709.04
  5. Step 5: Solve for x
    x = 71,618,614,709.04/324,621.60
  6. Step 6: Final answer
    x = 220,621.84

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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.