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Finding the Fourth Proportional to 489,446.55, 675,442.80 and 274,573.80

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Solution

The fourth proportional to 489,446.55, 675,442.80 and 274,573.80 is: 378,915.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,446.55 : 675,442.80 = 274,573.80 : x
  2. Step 2: Convert to fraction form
    489,446.55/675,442.80 = 274,573.80/x
  3. Step 3: Cross multiply
    489,446.55x = 675,442.80 × 274,573.80
  4. Step 4: Simplify right side
    489,446.55x = 185,458,896,278.64
  5. Step 5: Solve for x
    x = 185,458,896,278.64/489,446.55
  6. Step 6: Final answer
    x = 378,915.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.