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Finding the Fourth Proportional to 363,607.80, 545,411.70 and 213,919.80

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Solution

The fourth proportional to 363,607.80, 545,411.70 and 213,919.80 is: 320,879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,607.80 : 545,411.70 = 213,919.80 : x
  2. Step 2: Convert to fraction form
    363,607.80/545,411.70 = 213,919.80/x
  3. Step 3: Cross multiply
    363,607.80x = 545,411.70 × 213,919.80
  4. Step 4: Simplify right side
    363,607.80x = 116,674,361,781.66
  5. Step 5: Solve for x
    x = 116,674,361,781.66/363,607.80
  6. Step 6: Final answer
    x = 320,879.70

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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.