Home / 389,919.90-584,442.45-221,520.90

Finding the Fourth Proportional to 389,919.90, 584,442.45 and 221,520.90

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Solution

The fourth proportional to 389,919.90, 584,442.45 and 221,520.90 is: 332,032.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,919.90 : 584,442.45 = 221,520.90 : x
  2. Step 2: Convert to fraction form
    389,919.90/584,442.45 = 221,520.90/x
  3. Step 3: Cross multiply
    389,919.90x = 584,442.45 × 221,520.90
  4. Step 4: Simplify right side
    389,919.90x = 129,466,217,522.21
  5. Step 5: Solve for x
    x = 129,466,217,522.21/389,919.90
  6. Step 6: Final answer
    x = 332,032.85

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1.5x scale

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.