Home / 389,618.20-584,427.30-221,656.60

Finding the Fourth Proportional to 389,618.20, 584,427.30 and 221,656.60

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Solution

The fourth proportional to 389,618.20, 584,427.30 and 221,656.60 is: 332,484.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,618.20 : 584,427.30 = 221,656.60 : x
  2. Step 2: Convert to fraction form
    389,618.20/584,427.30 = 221,656.60/x
  3. Step 3: Cross multiply
    389,618.20x = 584,427.30 × 221,656.60
  4. Step 4: Simplify right side
    389,618.20x = 129,542,168,265.18
  5. Step 5: Solve for x
    x = 129,542,168,265.18/389,618.20
  6. Step 6: Final answer
    x = 332,484.90

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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.