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Finding the Fourth Proportional to 285,622.20, 428,433.30 and 259,378.20

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Solution

The fourth proportional to 285,622.20, 428,433.30 and 259,378.20 is: 389,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,622.20 : 428,433.30 = 259,378.20 : x
  2. Step 2: Convert to fraction form
    285,622.20/428,433.30 = 259,378.20/x
  3. Step 3: Cross multiply
    285,622.20x = 428,433.30 × 259,378.20
  4. Step 4: Simplify right side
    285,622.20x = 111,126,258,174.06
  5. Step 5: Solve for x
    x = 111,126,258,174.06/285,622.20
  6. Step 6: Final answer
    x = 389,067.30

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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.