Home / 399,429.20-599,318.04-212,221.52

Finding the Fourth Proportional to 399,429.20, 599,318.04 and 212,221.52

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Solution

The fourth proportional to 399,429.20, 599,318.04 and 212,221.52 is: 318,424.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,429.20 : 599,318.04 = 212,221.52 : x
  2. Step 2: Convert to fraction form
    399,429.20/599,318.04 = 212,221.52/x
  3. Step 3: Cross multiply
    399,429.20x = 599,318.04 × 212,221.52
  4. Step 4: Simplify right side
    399,429.20x = 127,188,185,412.22
  5. Step 5: Solve for x
    x = 127,188,185,412.22/399,429.20
  6. Step 6: Final answer
    x = 318,424.86

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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.