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Finding the Fourth Proportional to 363,412.80, 545,443.20 and 213,465.60

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Solution

The fourth proportional to 363,412.80, 545,443.20 and 213,465.60 is: 320,388.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,412.80 : 545,443.20 = 213,465.60 : x
  2. Step 2: Convert to fraction form
    363,412.80/545,443.20 = 213,465.60/x
  3. Step 3: Cross multiply
    363,412.80x = 545,443.20 × 213,465.60
  4. Step 4: Simplify right side
    363,412.80x = 116,433,359,953.92
  5. Step 5: Solve for x
    x = 116,433,359,953.92/363,412.80
  6. Step 6: Final answer
    x = 320,388.71

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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.