Home / 389,865.80-584,993.10-221,515.40

Finding the Fourth Proportional to 389,865.80, 584,993.10 and 221,515.40

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Solution

The fourth proportional to 389,865.80, 584,993.10 and 221,515.40 is: 332,383.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,865.80 : 584,993.10 = 221,515.40 : x
  2. Step 2: Convert to fraction form
    389,865.80/584,993.10 = 221,515.40/x
  3. Step 3: Cross multiply
    389,865.80x = 584,993.10 × 221,515.40
  4. Step 4: Simplify right side
    389,865.80x = 129,584,980,543.74
  5. Step 5: Solve for x
    x = 129,584,980,543.74/389,865.80
  6. Step 6: Final answer
    x = 332,383.55

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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.