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Finding the Fourth Proportional to 489,861.60, 675,962.78 and 274,959.69

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Solution

The fourth proportional to 489,861.60, 675,962.78 and 274,959.69 is: 379,418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,861.60 : 675,962.78 = 274,959.69 : x
  2. Step 2: Convert to fraction form
    489,861.60/675,962.78 = 274,959.69/x
  3. Step 3: Cross multiply
    489,861.60x = 675,962.78 × 274,959.69
  4. Step 4: Simplify right side
    489,861.60x = 185,862,516,440.34
  5. Step 5: Solve for x
    x = 185,862,516,440.34/489,861.60
  6. Step 6: Final answer
    x = 379,418.42

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1.5x scale

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.