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Finding the Fourth Proportional to 285,610.40, 428,415.60 and 219,255.20

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Solution

The fourth proportional to 285,610.40, 428,415.60 and 219,255.20 is: 328,882.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,610.40 : 428,415.60 = 219,255.20 : x
  2. Step 2: Convert to fraction form
    285,610.40/428,415.60 = 219,255.20/x
  3. Step 3: Cross multiply
    285,610.40x = 428,415.60 × 219,255.20
  4. Step 4: Simplify right side
    285,610.40x = 93,932,348,061.12
  5. Step 5: Solve for x
    x = 93,932,348,061.12/285,610.40
  6. Step 6: Final answer
    x = 328,882.80

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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.