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Finding the Fourth Proportional to 363,386.80, 545,404.20 and 213,439.60

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Solution

The fourth proportional to 363,386.80, 545,404.20 and 213,439.60 is: 320,349.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,386.80 : 545,404.20 = 213,439.60 : x
  2. Step 2: Convert to fraction form
    363,386.80/545,404.20 = 213,439.60/x
  3. Step 3: Cross multiply
    363,386.80x = 545,404.20 × 213,439.60
  4. Step 4: Simplify right side
    363,386.80x = 116,410,854,286.32
  5. Step 5: Solve for x
    x = 116,410,854,286.32/363,386.80
  6. Step 6: Final answer
    x = 320,349.71

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1.5x scale

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.