Home / 389,918.40-584,440.20-221,519.40

Finding the Fourth Proportional to 389,918.40, 584,440.20 and 221,519.40

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Solution

The fourth proportional to 389,918.40, 584,440.20 and 221,519.40 is: 332,030.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,918.40 : 584,440.20 = 221,519.40 : x
  2. Step 2: Convert to fraction form
    389,918.40/584,440.20 = 221,519.40/x
  3. Step 3: Cross multiply
    389,918.40x = 584,440.20 × 221,519.40
  4. Step 4: Simplify right side
    389,918.40x = 129,464,842,439.88
  5. Step 5: Solve for x
    x = 129,464,842,439.88/389,918.40
  6. Step 6: Final answer
    x = 332,030.61

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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.