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Finding the Fourth Proportional to 285,959.20, 428,938.80 and 219,733.60

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Solution

The fourth proportional to 285,959.20, 428,938.80 and 219,733.60 is: 329,600.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,959.20 : 428,938.80 = 219,733.60 : x
  2. Step 2: Convert to fraction form
    285,959.20/428,938.80 = 219,733.60/x
  3. Step 3: Cross multiply
    285,959.20x = 428,938.80 × 219,733.60
  4. Step 4: Simplify right side
    285,959.20x = 94,252,266,703.68
  5. Step 5: Solve for x
    x = 94,252,266,703.68/285,959.20
  6. Step 6: Final answer
    x = 329,600.40

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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.